Which is the best OS?

[Hiko]

I've tried XP, Vista, Windows 7 and the Mac OS X.
From all of them, I'm enjoying Windows 7 the most.

XP was great, but you have to move on if you're stuck to it and try Windows 7.
Vista was ok, I honestly never had problems with it..but apparently alot of people did.
Mac OS X is great, but I find the Apple computers to be overpriced.
I never tried Linux.