I’m currently using two cameras, the Canon G11 and T2i. For the G11 I’ve got Lensmate “A” and “B” adapters so I can use filters–mainly a polarizer. Lenses for the T2i are all Canon: EF-S 15-85mm f/3.5-5.6 IS USM, EF 70-300mm f/4-5.6 IS USM, EF 28mm f/1.8 USM, EF 85mm f/1.8 USM, and an EF 50mm f/1.8 II (“Nifty Fifty”). I got the primes for the T2i for low light situations, but find myself mostly using them as general purpose, walk around lenses. The 15-85mm is my “go to” lens, and is almost always on my camera.
Occasionally, I’ll bust out the iPhone for a quick blog post shot. (I’m a big fan of the Hipstamatic app!)

This shot of my old Miller Head on wood legs tripod was taken with the G11.