Right now, I'm playing Metal Gear Rising: Revengeance, Counter Strike: Global Offensive, Persona 4, and Fistful of Frags.
Metal Gear Rising is surprisingly awesome. Cool soundtrack, amazing bosses, and over the top action. I love it.
Counter Strike, I mainly play with some of the guys I know. I think I'd go insane if I had to solo queue in matchmaking.
Persona 4, my god I love this game. It's seriously the best JRPG I've had the pleasure to play. I'm working on my first 100% run.
Fistful of Frags is a free FPS (by free I mean FREE, it's literally a free game, no ingame purchases or anything). It's great fun and the community is fantastic.Colt Navy is the best gun.