@ahmshaegar: one way or another, show some pride!
No, I'm joking...but more than half of the people here obviously feel strongly in one direction or another. It just happens.
I won't spend much effort on this timeless and futile debate, because in the end the apple type users need their computers, and the windows types need theirs.
I'm running Vista with no issues and I was happy to have to manually tweak the tcp settings of a brand new OS, turn off the user account control since I know what I'm doing, install my anti-virus and spyware software, turn off some of the more useless new services (readyboost w/ tons of ram? ...no, etc.), and a fix/tweak/patch a number of other things.
It hasn't crashed once and the list of software titles for windows is second to none; and I can upgrade any part I want. I can't imagine using a system with less control.
Then again I also can't imagine letting my grandmother get rid of her mac...she'd call me for help too much.