Digital VAX/VMS is my favorite version of Windows. (Windows NT was originally a clone of VMS with a DOS-like UI, but it evolved into Windows 10 somehow.)
I like Windows 10 the most. Windows 7 UI in my opinion looks a little tired/outdated. Windows 8 was not THAT bad, but significantly worse compared to 10. Also 8 was a no-no for my parents, because it was quite hard to get used to things after many years of XP and 7
For me its Windows 7, I probably ran it for the longest out of all the windows OS's I had, as for the flavour of Windows 7, it had to be Windows 7 Ultimate because it was just the best to have it might have cost a bit more but it was worth it
Not a fan of Windows (I only use Windows for games, everything else on my MBP), but if I had to choose one, 7 would be my first choice.
living with the OS it has to be Win 10, windows updates don't hog all the memory and disk (like Win 7) and Windows Defender is awesome, also I don't have to visit my grandparents that much to "fix" their computer where they have probably opened up something like the notification area. Windows 7 looked good, but for looks Windows Vista wins (by far) especially for screensavers! the windows energy screensaver looks awesome in a fluid 60fps Windows XP was like a "lite" version compared to Vista and beyond, it runs on literally everything, but is not bulletproof compared to windows 7 (never experienced a BSOD on my machines, only on a school PC because someone had put pencils in the fans to overheat the machine) oh and I don't like Windows 2000 that much, like sometimes it can behave erratically and you cant fix it that well, just have to reinstall the machine's OS
Speaking of 2000, don't install an old Firefox then go to a modern site. It will somehow crash the entire system.
Either Windows XP because P i n b a l l or Windows 8 as I use it in my main pc (860K @4.2, GTX960) and I loathe windows 10. yes I am controversial
i like windows 10 the best. Windows 8.1 was the worst, if i wanted my computer to run like a tablet i would have bought a tablet.
Vista. As a kid it was the only thing we had besides Windows XP and as a kid i enjoyed visually Windows Vista a lot. (i still do today). In performance terms, it was maybe awful (i cant recall as everything ran "Fine" ((atleast in my memory))), but to me its one of the prettiest Windows ever made
I like XP 7 and 10 but i actually like 10 the most performance wise its alot faster than 7 the only thing i dislike about is that theres alot of stuff on there i dont need