I find Windows 8 very, bad.
Why? Im a student developer and my career is being a 3D Designer. So what's the problem? Windows 8 is DIFFICULT for us developers to use. The coding of it is way different.
Big companies especially gaming companies had problems with this, Mojang makers of Minecraft found it terrible. EA games released lots of complaints, nobody was happy with it.
I think Microsoft are making them a little too simple, when complex things contain many knowledge.