I went with a Nikon DSLR because back in the early 70s I had a Nikon F2, and loved it. I had three lenses with it, which I used a good bit. I had lots of photo courses in school. That's why I bought the camera to start with. I wish I still had that camera. So, when it was time to buy a DSLR, I was familiar with Nikon quality, and wanted to stick with a brand I was familiar with.
They have a Canon camera where my wife works (I forget the model number). She has brought it home a couple of times, when she needed to stop on her way to work the next day, to take a couple of pictures. I played around with it, and found the Nikon menus are easier to navigate and the buttons and adjustments are easier to use on the Nikon. So, to me, the Nikon is much more user friendly.
I think I definitely made the right decision buying the D7000, especially now that I've learned the camera. Of course i would have loved to get the D3 or D3s, but couldn't afford thousands of dollars to buy a camera, since I'm not a pro and don't make money with it.