I really don't like KDE, Gnome or Xfce is far better IMO. But that is the beauty of Linux is it not? The ability to chose your shell. It may be harder to customise than Windows, but there are far more options when you work out what you are doing.
That said, my main PC will remain Windows only. Don't get me wrong I like Linux, and am really getting to grips with it since buying an Acer Aspire One but I like my gaming hassle free.
I might put Ubuntu 8.10 on my old laptop at the weekend to see what it is like, and then may dual boot it on my second box with XP.
 Vista Home Premium
 and got rid of that stupid netbook GUI they put on it
When I get around to building the thing out of the parts I have left over from various upgrades that is.