I've been using Windows 8 for 18 months now on my phone, about 2 months on my desktop. (8.1, that is, of course.)
And I love it. On the desktop, the boot time alone is worth the upgrade. For the first time since DOS, I've got a computer that boots, near as I can recall, as fast as DOS did. (But unlike DOS, I don't need to choose between six different config settings at boot, depending on what I want to run today.)
It has no third-party AV or firewall, the internal tools do those jobs just fine. I've installed a couple of hundred gigs of software on it from downloads and discs, and never paid a dime through the MS app store. And I haven't yet found anything from XP days that won't run on it, with a minimal amount of crowbarring.
Just sayin'. Obviously haters gonna hate, but be aware there is such a thing as a contented W8 user.