1. It looks a hell of a lot better.
2. Start Menu with Search function means a lot of extra time to do everything else!
3. Start Menu itself looks nice and it's still easy to use. (with some changes from XP, of course)
4. New " beginner's " version of the control panel is actually usable! :D
(And to those who can make out what my Windows Vista username is from the screenshots, don't try. Don't waste your time. There's an even larger loophole than my username for which you don't have to guess the password. And no, I didn't do anything funky to Wordpress. :D)