I don't hate it, but it is a backward from 7, which is the best IMO. It least I don't have to "hover" over a mysterious area of the screen just to do able to do certain things (8).
They probably just made it to look cool on a tablet, only adding a junky start menu to stop the wining from 8.
If I can guess, MS is on a never-ending crusade to distance itself from the XP gui. It's default gui, in almost any color option, always looked childish. Vista got much better, and for a desktop they hit it with 7. But they think they can get the tablet market by making the desktop and laptop look and feel just one, so I am sure some SR down the road will make it even worse.
I guess since we are in an app (or 20) most of the time, it doesn't matter much in the grand scheme of things.