We had those menus that adapt to what you use most, so that it becomes very difficult to find options that you use little. We had Clippy, meddling with what you're doing, and very difficult to get rid off. We had the overly annoying UAC in Vista.
And now there's that interface for small touch computers, enforced on keyboard & mouse desktop PC's, with no easy way to turn it off permanently, or to never see it at all. A Start button that is not visible when you need it. An ugly toy computer desktop GUI.
I wouldn't even "upgrade," if that's even the right word, to Win8 if I got paid to do it.