I use a Cannon EOS Digital Rebel XTi. The main reason I bought it was I'm a cheap bastard and didn't want to have to buy new lenses for a Nikon, etc, although I've upgraded my lenses since I bought the camera body, and I've been using Cannon's all my life except when I was in high school when I used Nikon 8008's film cameras for Yearbook. I've had only small issues with it. Most notably when using the flash sometimes you get a busy message if you want to take several shots in a row, I overcame this by using a dedicated flash unit instead of the on camera one.
Here are some examples I've taken with it:
