Messed with Win 7 quite a bit when building gaming pc, I liked Win 7, had it installed on SSD. But the initial hurdle of getting used to te interface made me wish it was XP. And manually disabling all the never used devices and processes from loading too was tedious. Vista I just never liked, never will. Overall, trying to be all things to all users means MsFT comes bloated with tons of stuff that most users just dn't need but must help pay for.
Win8 looks ..kinda ugly to my eyes. But I have yet to try it. I'm stuck with wanting to go to cmd prompt to do certain things faster in Windows or just wanting trouble free operation from an iPad. My Kindle Fire became an expensive alarm clock because the inexplicable window tabs reminded me too much of PC virus. So maybe it's just chronic fatigue with computer OSs in general since my Apple iP IIe days.
