Regarding the system itself, one likes or dislikes ModernUI interface. But as there is no requirement to use if you do not like, I do not see why sulk Windows8 for this reason. And no start menu, it's not as if we could not resettle in 3 minutes watch in hand!
Anyway, I personally am not convinced by the new ModernUI interface for use with the keyboard and mouse (so I do not use it), but I am fully satisfied with Windows 8!