Not sure of your point, but a top 10 OS list with no Microsoft contribution present is silly.
With hundreds of operating systems to choose from, I don't see why. You don't have to hate Windows to prefer 10 others. It's a personal choice, at the end of the day.
Of all the windows varieties, my own personal preference (in contrast to Boudicca) is Windows 2000. In many ways it was the first version that was as robust as NT (upon which it was built) that had the ease of use of 9x. It was also last version where you knew exactly where everything was and what everything did. Things started to get progressively more and more abstract since then.
