I do most of my gaming on the xbox360 these days. I love playing games from the couch on a big screen. It's also nice not having to worry about hardware requirements as all 360 games always run which sorta reminds me of the early days of computing when an Apple II or C64 games always ran consistently from machine to machine. Seems like every time I ran a game on a Windows box it needed software, OS and driver updates.
Anyway, I'm currently finishing up Bioshock 2 and will start Dragon Age soon. I also play Borderlands when friends are available to play with.
I play MAME and Amiga games when I need a quick game fix of 10 or 15 minutes.