I started my MMO career with Ultima Online in 1998. Best 3 years I ever spent in a game.
Moved to EQ, but didn't dig their super-slow levelling system -- my friends all outlevelled me -- so I left that after 3 months. Asheron's Call lasted me two.
Anarchy Online? Not that good. Loved the instancing bit, but most of it annoyed me so that didn't last long. I tried Lineage and Lineage 2 and found both to be too grindy.
I had a beautiful 18-month run in Shadowbane, but 12 of that was in beta, and we knew after the first 6 months that it would fail at release. It was like having a fling with a married woman -- you knew as soon as the truth got out, it'd be over.
EVE never interested me. Planetside kept me busy for 6 months (easily the best system for newbies to jump into). FFXI sucked me in for a good year (despite my EQ hate, I had RL friends in the game). Everquest 2 kept me for 4 months, but left when the crafting system sucked me in so badly that my college grades were falling.
By this time, I had seen it all -- so when WoW came out, I got to 60 fast, then realized what the endgame was and I was OUTTA THERE. Left after 4 months because I'm so over 4-hour sessions at one sitting. LOTRO was decent, but after the 30s I had to group up too much for my casual playtime.
Age of Conan, well... heh. Do I really need to explain? And lastly, I played WAR for only 2 months. The game wasn't... BAD, but it did nothing to suck me IN. Nothing there to make me CARE for the game.
I took time off from WAR due to a bad work schedule and -- no joke -- it was the first time in my MMO career that I didn't miss it. There were even parts of Lineage 2 I liked enough to want to go to back, but WAR, as well-done as it was, doesn't have that intangible to keep me compelled. It was like someone swapped out my Marlboros for Candy Cigarettes, you know? It tasted nice, but there's no nicotine to feed the addiction I bought these things to feed!
And that leaves me... here. The only MMO-like game I play now is NHL09's EASHL league on the X360.
I took a long break from the genre before Age of Conan because of how dissatisfied I was -- and if I'm going to devote my casual-like playtime to one game, it dang well better be worth it. When both AoC and WAR predictably disappointed, where do I turn?
Darkfall? Ha. haha. No, really, stop it.