One thing I really dislike about the Metro UI is that you lose your wallpaper. Yeah, you can see it when you go to the desktop, but then the desktop is fairly useless since it is more difficult to put shortcuts on etc. It's become just a place to run your programs instead of a launching point.

I'm starting to shift over to the camp that says Metro is a fail. I think it would be great on a tablet or phone but as a desktop UI I think it fails.