Thanks to a general lack of time, when I do find time to play games, I tend to be drawn to my old-school MMO, simply because I know it's not going to be around forever. I do need to make sure I make more time for gaming this year though, since I feel like I need to game more. It's sick that I benchmark these games for what seems like night and day, but I never stray past the few minutes I spend in each one.
That aside, this year, Left 4 Dead impressed me quite a bit, bugs aside. The graphics were fantastic, it ran well, and the audio was impressive. It's really, really fun with a group of good friends, and forces you work as a team. I look forward to seeing what future updates come to this one. Sadly, I don't have an opinion on any other game this year, since I really don't recall playing any.