1. Warhammer online

2. LOTRO

3. Mortal online

4. Rift

5 FF XIV

1. WAR

2. AoC

3. EQ2

4. CoX

5. TSW

After playing just about every mmorpg since The Realm and M59 onwards, these were the 5 I disliked the most.

Edit - TOR should really be up there too, as that was literally the fastest I ever uninstalled. But I never bought it (just played best) and was sticking to ones I actually bought.

STO

CO

FFXIV

I'd like to add SWTOR as a honory mention because I'd been waiting for the free trial to check it out, by the time a free trial was available, it wasn't even worth a free trial.

UO - after they messed it up

WoW - Never liked it much

AoC - What happened to the rest of the game after Tortage?!?!?

FFXIV - Where is the content at?

RIft - It felt like I was in Azeroth.

1. Rift

2. WAR

3. AoC

4. Lotro (shortly after the f2p conversion...vanilla/release Lotro was okay for awhile.)

I can't think of a 5th that is an AAA game, seeing as how I haven't/don't plan on buying ToR/Tera/TSW/D3, and everything else aside from them i've enjoyed to some degree.

1. TSW; I was following this game for years and really looking forward to it. After a beta weekend I found the combat overall was just not very much fun for me. Any game that involves combat 90% of the time must be fun to keep me playing.

2. Lineage 2; I arrived at this game very late after release. I could not get out of the starting areas without being ganked by pvpers. Normally this type of thing does not bother me much however no one else in the area seemed to care or even offered some assistance at my request. The game seemed like it would be fun, but my experience pushed me away.

3. Aion; The concept of this game was interesting but just like an above poster pointed out, the pvp was just a lag induced exercise in patience. I could always "feel" when someone was hunting me because the lag would start. I have played both the EU and NA servers and neither community had a friendly social based atmosphere. Guild invites and duel challenges were just spammed at me to the point of annoying.

4. Face Of Mankind; My first few days playing this game were very fun, but the faction I joined was very demanding. The people at the top were not very helpful but quick to give commands and instructions. I can follow orders, but I also want to be given context, most people I played with were very indifferent to "new" players.

5. Faxion(Spelling?); This was an neat concept, Heaven versus Hell, but again the combat was my final straw. When people attacked it was just a giant blur of skills and lag before an eventual survivor was determined. The other big negative for me was the game was designed to be huge in the cities but the maps were tiny with paths driving players on rails into the game.

Edit. Not all AAA MMOs perhaps but the trend is well illustrated.

1. WoW

2. Vangaurd

3. Mortal Online

4. Warhammer Online

5. SWTOR

This is tough as there aren't a lot of MMOs out there that I've uninstalled mere minutes after playing it for the first time.  I'd probably go with some random F2P MMORPGs.

To be honest I give all AAA MMO's a fair chance so I would not vote for any always try to find the good points and get to a level where content opens up.

That being said Free to play korean ports I could list 100's I have uninstalled from 5 mins of gameplay.

AAA only?

Ok.

In no particular order.

1. SWTOR - was like culmination of trend I dislike in mmorpg's. Mechanics in this game just screamed: solo, single player experience. + I really dislike cinematic-like rpg's even as single player games. Just not feel like playig my character, but like watching someone else. 

2. Age of Conan - zoned small world which I very much dislike.  + some good ideas but coupled with bugs, lack of focus, Funcom could not fix core game feaures and not providing on promises (sieges anyone?).  Anyway I was right, since game has skeleton crew and patches that break as much as fix.

3. Rift -  Just game design I don't like. Small tiny world, everything way too conveniant. Blazing fast levelling speed, totally hubbed quests usually go 30 meters away kill and get back. Most quests don't even have any expanation or text. Just go kill or bring. Totally generic looks & bland world.

I don't like that I don't like this game, since Trion support, business model and everything else seem top-notch. Just not kind of mmorpg desgin I like.

4. STO - garbage game, garbage business model with stunningly arrogant CS put into P2P game ! initially and Freemium now. So unfinished, weak and bugged that It felt like slap in a face.   Imho should not be considered AAA, but since it is by universal acclaim then I will list it.

5. Vanguard - horrible horrible launch, totally unfisnhed game and last but not least rampaging exploiting, gold selling, awful performance and bugs * coupled devs beign unable to fix / minimize it fast and support being passive to exploits, sellers drove me away which is a shame cause game had really nice features, ideas and design. Still above things totally ruined game that could be quite succesful.

Good thing that I had access to Swtor beta event(s) so I havent spend money on it, got free copy of Rift with 30 days of play so it cost me 0$ as well.  STO I was fortunate enogugh that my colleague borrowed me his account to check it for few days.

Would be more angry If I bought all of them.

Not got five here, but here goes:

1. TSW - I didn't even manage to form an opinion on the game, I uninstalled the game because I couldn't play more than 20 minutes before getting motion sickness. (And yes, I did turn off camera shake, and lower my mouse sensitivity.)

2. SWTOR - Sort of similar issues - didn't manage to form a proper opinion on the game before my GPU temps were skyrocketing, and I really don't want to toast my GPUs. (Yes, did turn graphics down to what was minimum acceptable levels, no help.)

3. TERA - Leveled to around lvl14 or so, when I just got to the point of asking myself "Why do I even bother with these quests?". Uninstalled, never looked back.

4. Aion - Held my attention for slightly longer than TERA, but in the end the quests got to me again.

There was only 1 game I really didn't like.  CO, hated the way my characters looked, the environment... tried it about a month ago, only lasted about 10 minutes.  Not even enough to really try the game, just couldn't stand the way I looked.  There may be lots of options for gear/power, but for character creation as in making my body/face, one of the worse I've ever seen.  And I don't like cell-shading.

Thats pretty much it.

I tried Aion a month or so as well.  It didn't grab me, but couln't really say I disliked it. 

SWTOR

AoC

WAR

MxO

CO

Top 5 AAA Mmo's I couldn't uninstall quickly enough:

1. Star Wars The Old Republic
2. Warhammer
3. Aion
4. Rift
5. The Secret World

1. Tera

2. Mortal Online

3. Age of Conan

4. Vindictus

4. Warhammer

1. Runes of Magic (really cheap wow clone)

2.Silkroad (asian bot n grind  fest)

3.Guild Wars (yes the original, utter garbage)

4.Black Prophecy (is this even a game?)

5.Battle of the Immortals (so many things to do, to bad they all suck)

1 MO

2 Tera

3 Aion

4 Allods

5 Perfect World

In no particular order:

LotRO -- I've actually spent some time playing this, but lately I never seem to last more than a couple of days at most.  I'll always consider this a Geritol-ridden WoW clone.  It's pretty average in every respect, but everything is so sleepy looking, from the understated art style to the boring music to the slow-paced combat.  It doesn't help that endgame is reportedly a total grind, and grinding mobs for traits/virtues is a terrible idea.

Age of Conan -- Plastic-looking graphics with some of the worst looking trees this side of Mortal Online.  Stiff animations and a frustrating, wack-a-mole combat system.  Disjointed, tiny gameworld.  

GW2 -- 12 FPS in the starting area.  Clunky character movement and combat.  Camera feels like it's too low.  PvE progression consists of killing waves of mobs over and over or protecting caravans.  Lots of large, expansive territory with no purpose.  Feels more shallow than a standard themepark and less fun than the original Guild Wars.

FFXIV -- Just a bad game.  The graphics are the best in the genre, but the game plays like a stinking pile of dog crap.  As if it was developed in a vacuum, the game fails to take notice of all MMO innovations developed within the last 9 years, and somehow comes out with even less features than the original Final Fantasy MMO.  Completely borked combat with a frustrating target switching mechanic.  I see potential in the game, so hopefully 2.0 makes it playable.

Istaria -- Awful performance even on modern PCs.  Community consists almost entirely of dragon players.  Probably not even 100 people logged in half the time.  Most fun I ever had was when the game glitched and gave me moderator control over the newbie chat channel.

1 - WoW: Was to be my third ever mmo in my young teenage years, and figured I'd enjoy it. The community in the starting area I was in rubbed me wrong and spent maybe 18mins disgusted with them so I quit. (later played p-servers to experience the game that everyone raved about)

2 - Allods - Well, I made it through the tutorial and decided the game was not for me

3- TERA : on a dayw ith nothing better to do, I beta'd it and I left it byt that night, never to return...those danged quests were gonna make me crazy X.x

4 - AoC - the game jsut felt horrible

5 - (enter title here) Sony games (_ _"  - Somehow they always seem to get on my nerves within a week of starting a game, and so most Sony hosted mmos for me have never made it a week...if the people are ncie it makes 10-14 days

I have 2 TB of disk space and I don't download pron or pirate movies so I haven't had any need to delete any games for some time now. But I did uninstall  FFXIV. Not because I needed to but on general principle.