The problem with this list is that I don't hate any of the distros that I've entered here. Even number ten is one of my all time favorites but something has to be on top and something has to be on bottom. Check out the list and see what you think.
I was a bit surprised by the #1 pick, but this is a great list that shows the thriving diversity that open source fosters. Some might argue that there are too many distros, but looking at this list I'm reminded that each of these fills a particular need and again due to the magic of open source, filling a niche doesn't mean starting from scratch. Awesome stuff.