Eh. 8.1 works fine for me. I get the performance improvements over 7, but I also get to control when to apply updates. The start screen was an eyesore at first, but I actually kind of like it now. The Windows 10 "start menu" is much worse, because it's exactly the same as the start screen but way smaller

I have to use 10 at work because I'm working on a driver that I need Windows 8 or newer to write it and the only HDD with anything like that on it had 10, and I absolutely hate that once in a while I come in to work and the OS will have decided at some point during the night that updating itself was more important than whatever it was I had running.