Several months back, I upgraded to 8.1 from Vista. I don't regret it. Once you find your way around the goofy bits, it's just a great Windows version.
The touchscreen stuff isn't forced on you at all, really. In more recent updates, they've made the Start mode stuff integrate a lot better with Desktop mode as well. (they actually can be handled like real windows wo)
Performance-wise, it's worked great; compatibility-wise, no problems; looks-wise, it's p ok; I'm satisfied.
also MOUNTING .ISO FILES COMES WITH WINDOWS NOW WOW that's so small but i love it