Finished Saint's Row 2! That was my favorite GTA style game to play. Not the best mind you, but the most fun with the best controls.
My next game sitting around is Fallout 3. I really hope I like it... I've heard a lot of great things about it, I'm interested in the story, and I know you can play it for like 100 hours if you want. Also, it's the last game I own I haven't played yet!