Devil May Cry 4! For multiplayer, probably Phantasy Star Universe, it's the only one I play for a multiplayer game really.
I mostly play Age of Conan these days, and a bit of GTA IV. Waiting for the rush of fresh 2009 titles.
I still haven't gotten my account activation code from ID yet for QuakeLive. I'm so sad about that.=[ Speak of the devil! Just got it!
CS:Source for MP and Stalker games for SP, SP could become Fallout 3 though, getting it after exams. Could've gotten it sooner but buying a new game right before exams = exams fail xD
Jericho is the best FPS ever made IMO, and ever since i bough it early last year, its been my favorite. 9/10. Graphics, visuals, gameplay, fun factor, story, characters, perfect. Only flaw, no editor tools.
Fallout 3, + Wesnoth I'm torn about getting any more games till I build a rig as a 9600M isn't that great of a card. /just had to blow $300 on glasses + eye exam cause I lost a lens
World In Conflict been playing it since beta and still hasn't lost its fun. L4D and COD5 my next choices.