LSW
Personally, I completely lost interest in Windows after 7 —having started with 3.1. The best of the bunch, IMHO, has been XP x64 edition, which actually was a Windows Server 2003 with XP written on it in crayon.
I have the feeling that, when MS Office will work decently on Wine (or whatever future Linux Subsystem for Windows), there will be very little point left in having a Windows OS anyway…