I'm not going to list "The perfect PvP Build!" and the "Ideal PvE Grinding Build!"
What I will do is talk about what my build goals are, and what I've noticed about the few talents I have so far (and the ones I add as I go).
I'm corruption spec. Sorta. More accurately, I started down the corruption tree for 5 levels, then realized how badly I needed the general talents, and now am spreading my points between the two (though I nearly have General filled out as far as I will take it, then I can happily continue down the Corruption tree).
Things that the general tree has to offer:
There are some very, very good PvP oriented talents in the General tree. To be honest, if I was on a PvE server, or actively tried to avoid PvP while I level, I would probably ignore this tree. But I seek out PvP, and I like some survivability when I get jumped.
Excellent Balance - This talent gives you a means to avoid those nasty knockbacks that Barbs and soldier classes have...and casters...and priests...okay, so just about everyone except Sins. This isn't a catch-all...it doesn't work 100% of the time (But works more often than not), but only lasts so long. So you have to try to guess when they're going to attempt the knockback, which is easy...they try to do it ASAP. Problem is, once you use it, you better kill them before their cooldown's up, because theirs will be up before yours.
Escape Artist - The biggest reason I invested feat points in the tree. Also the reason why I ignore the whiney "I always get rooted! QQ" threads in the 'Sin forums. I have it maxed out, and though it may change at a higher level, 9 times out of 10 (taking into account that 90% of stats are made up on the spot) it works. And as I mentioned in my PvP entry, it usually suprises the hell out of whoever's trying to root you.
Agile Mind - I've only invested 1 point so far, because at this level, I think someone's only tried to fear me once...and that was last night. (And, because of agile mind, it didn't work. Take that you already underpowered necro!)
I have three points invested in the evade ability (Can't think of the name off the top of my head). I figure, +3% evade can't be bad.
Lastly, I have a point in Swift Shadows, and plan to invest my next two in that aswell. I assumed it would be kinda a BS talent, but after talking about it on the forums, I decided it sounded worthwhile. Let me tell you, it was. Even with just 1 point, and skulk maxed for my level (roughly 360 IIRC), I can move in stealth *nearly* as fast as someone running regularly (not sprinting). This helps emmensly when I'm trying to track someone down and kill them.
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As for my corruption talents, obviously the first 5 go in corrupting blades. No choice there. Next I went with Corrupting strikes-for the cost of a Soul Frag, increases your offhand hit chance. I don't use this ability often, and wonder if Foul Corruption would have been better--though from what I've heard, the later is almost worthless.
I started putting points in Unholy Strength (okay, so only 1 so far). And will max that out. Then plan on moving to Dark Weapon for teir 4. Then you get into the leeches, and I'm undecided at the moment. I'll update that more when I get there.