I did try a few others when I was first trying out Linux. I know I tried Mandrake (which seemed ok), Lindows (which seemed too windowsy), and Slackware (which I couldn't figure out at the time) and a few others. To be honest, I originally went with Knoppix just because it was one of the few distros that would work with my old HPNA drivers (which I now realize is just because Klaus still uses gcc2 to compile his kernels unlike most of the other distros). Now that I can compile my own kernel I suppose I could use any of them, but I'm still using debian. I just don't see how the others could possibly be better.