I tried Windows 10 for a month , hated it , went back to Windows 7 . Tried Windows 10 again , hated it even more . I did a fresh install of Windows 8 and upgraded to Windows 8.1 . All is good .
Windows 10. Had it since it came out. Works fine. Just had to get used to Win. 8 then 10. After a while it's no big deal. Have it on 4 laptops/PC. I did find out some older printers are NOT compatible with 10..... and won't be.
In the basement the server is Fedora 23 x86_64, xfce- zfs on usb for the raid5 bulk storage. The old server was a Sun Blade 2000 2x750mhz system running OpenSolaris, but was kind of long in the tooth and took a lot of power. My daily driver at work is also Fedora/xfce. Fair warning- I have drunk the systemd kool-aid and think its a pretty good solution though I would happily do without its quirks.
I have one pet Windows 7 box- slow... fine for tax software I don't use it much- sucks but so does using Windows- disabled updates on it back when Microsoft instituted the mandatory telemetry and started pushing 10. Will run it till it dies...
OpenStep, Rhapsody, OS X, Windows 10, TI-99/4A, TRS-80, DOS 3.3, Win 3.11, CP/M and I just visited this computer museum which was really great http://www.spelcomputermuseum.nl/
I'm running OS X (10.11.6) on my desktop computer. And I have a laptop and netbook that are both running Lubuntu (can't remember which version). I don't use them all that often.
Most of the computers in the house are on Windows 10. I still have two using Windows 7. And.... have one machine each using XP, 98, and 95.... but they're really more just conversation pieces at this point.