Things I use: Photography
I take photos primarily with a Canon 5D Mark II paired with a Canon EF 100mm f/2.8L Macro IS USM Lens. It takes great photos at 100mm, as well as nice macro shots.
My other "primary" lens is a 50mm f/1.8, aka the Nifty Fifty. It's great for low light, and when you want that extra bokeh.
I have a few other lenses that I use: a 28mm f/1.8, a 55-200mm f/4.5-5.6, and a handful of EF-S kit lenses to go with my spare DSLR bodies (a 650D and a 400D). These don't get a very high rotation of use. I'm looking to replace the 55-200 with a 70-200mm f/4 IS L at some point.