Using vista and loving it... perfect stability, speed, everything just WORKS, seriously.. dont believe all the bs spread about vista, its a solid OS. OSX doesn't really offer me any benefits other than a huge price tag and a sleek box, plus I like to play games.
Tried redhat, mandrake (back when it was called mandrake), gentoo and had enough of it when I couldn't get drivers for my ATI graphics card or my tv tuner card.
I use centOS on my dedicated server and it does a damn good job, thats where linux belongs!
On a side note, can anybody actually state reasons WHY vista is crap? I would seriously like to know what everyone thinks... Just about all anybody can come up with so far is DRM, and yeah that was all a lot of hype.. it doesn't effect anybody at all.