I'm still on Windows because I'm a gamer, and while the gaming on Linux situation is improving, it's still not there yet. Games on Windows just work. I never have to do any fiddling. Download, install, play.

And maybe it's because I opt for the Pro version of Windows, but I don't have the advertisements people complain about. No Candy Crush, no news/tabloids, just my list of apps and a few shortcuts to things I've used.