I'm using Mandriva at the moment, although I do use XP on my laptop as I can't get wifi drivers working in Linux..

I suppose I just feel better when i'm using Linux, knowing that I'm using a free, community OS which is open source. I love the fact that KDE looks so much better, and so much more capable than the GUI in Windows.

Windows really slows down after a while, I've been running torrents throughout the night and in the morning the thing slows to a crawl. Reboot is the only way to restore its "speed".