I've been using Windows 8 for two weeks now and I must say, it's not as bad as people say. Aside from Metro/Modern UI, it's pretty much the same as 7. I didn't use the Menu Start anyway, so...
To put it shortly, the new UI has some things going for it and it seems like a good concept in general. The problem is, it lacks customizability. I'd love to set it up to suit me more, but I can barely change anything. So much wasted potential.
Xeon X3440 @3,1GHz + GTX660 + 2x4GB @1650MHz CL9 + Corsair RM650