A bunch. The ones I use the most are the 35/1.4, 50/1.4, 17-40/4, 180 macro, and occasionally the 100/2. I have a 10-22, Sigma 75-500, 18-55 IS, and the pancake 40/2.8. I also have a 2x extender that I like to strap to the 180 for unusual stuff.
Lenses still on the "to buy" list are the 85/1.2...