I'm playing Lost Odyssey, Dwarf Fortress (free, really fun, but super old school ascii graphics and it's really confusing at first), and World of Warcraft.
I am still addicted to Call of Duty 4. It's a blast and after four months it's still a lot of fun to play on multiplayer.
They remade Red Baron, maybe the second game i ever played in my life so it's bringing back lots of memories with the remake
I'm playing Crysis and COD4 at the moment, though I don't get to play them that much as I don't have the time!
Football Manager, but not very often... Trying to spend time on making money instead of just playing..
Right now I'm playing GTA: Vice City Stories on my PSP completed it, just messing about driving and stuff, haha.