I hated Windows 8 and 8.1 did nothing for me, so I stuck to Windows 7, Microsoft made such a good system with 7 that they blew it with 8, and from what I'm seeing about 10 doesn't impresses me at all.
Sadly the day I'll change computers I'll be forced to use 10.
In the mean time for my basic stuff, Internet, word processing, downloading I use Linux Mint.
I keep and use Windows because most of the world use it, and it can play games :-p
And I use a system that I absolutely hate but that the industry uses and that is Apple, that I only use for Final Cut and the Adobe suite.
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Beauty will save the world -- Fyodor Dostoevsky