I used to like PC gaming more, but I've gotten a lot more casual and prefer 360. I play with friends and it's more comfortable. I still get down with some Civ and other stuff on the PC though. My friend gave me a 7900 GTX recently, so I may get something to push it a bit.
Other than that, working on Arkham City on the 360, and games like Osmos and Great Little War Game on my phone/tablet.