-Grand Theft Auto IV (I don't care what some people say; this game is a masterpeice)
-Mass Effect
I'm just going back and replaying some favourites. My router is messed up right now, so no Modern Warfare 2.
And to anybody who has the Xbox 360 version of GTAIV available to them- I highly reccomend getting the Episodes DLC or disk. They are pretty much two games on their own, and they are such a damned good value. You get so much out of it, and if you are a fan of the story: this is an absolute must. The things that you saw through Niko Bellic's eyes were not even half of the true story. You may want to go back and do a quick(ish) playthrough of the original to have a full appreciation of the story cross-overs. And make sure to play in the order of The Lost and Damned and then The Ballad of Gay Tony, because TBoGT is the true ending to the epic trilogy with a beautiful scene of reflection. It even goes a bit past the end of GTA IV's story in it's own (chronologically).