I had Windows Vista for a very short period of time before downgrading to XP. Vista annoyed the hell out of me, barely anything worked without an hours worth of fighting with it. In the end, I upgraded to Windows 7 Ultimate and then back down to Windows 7 Premium (Came with a new computer, never got around to changing back to ultimate as there seems to be no noticeable difference between the two).
I played with the preview of Win8 and was not impressed. Felt like
Aston Shell on top of Win7, but less usable, and less fun to use. I have a hatred for anything "touch", mainly because I am heavy handed and have broken many phone screens due to this, but also because I like buttons, and without buttons, I feel lost. The day Windows goes 100% touch screen, I'll move to linux, and when they move, I'll go to wherever can allow me to use a good old fashioned keyboard and mouse.
Touch Screen is hell, and my mom always told me never to play with fire.