Right now playing Assassins Creed: Brotherhood. It's basically AC2 with some minor improvements, but nothing really exciting. It's still interesting enough to play though.
Also playing a bit of GT5 but that game kinda pisses me off in some ways.
On Steam I occasionally play The Misadventures of PB Winterbottom because it was only like 50 cent (lol) in the christmas sales. It kinda reminds me of Braid.