I've been having fun with a bunch of cheap games I bought on the Steam holiday sale.
Ghostbusters: This is more fun that I expected. It's really more like an interactive movie in some ways, and it's pretty funny sometimes.
Torchlight: Another surprise. This is a cute, cartoony Diablo clone that is just a blast to play. It's super simple and easy, and is just plain fun.
Indigo Prophecy: I missed this one when it came out, but so far it has me engrossed. I stayed up waaay to late last night playing it. There are really innovative aspects to this game, but also some pretty annoying ones. So far I really like the atmosphere.
Batman Arkham Asylum: I aleady had this one, but not done yet. It's great.
Good times.