I just want to say that KDE4 is awesome. When I switched to openSUSE 11.2 last month, my first impression is: I love Amarok, the Dolphin file manager is 100 x better than Mac's Finder and Gnome Nautilus and Windows Explorer altogether. The default setup is pretty annoying though, I had to turn off quite a few eye candies. At least it's configurable, unlike in Gnome.
I didn't regret one bit converting from Ubuntu (12.04) to SuSE (11.2) with KDE. It's stable, rock solid. In Ubuntu, my other PC's Radeon often locks up, but not the case with opensuse. Very stable. Moreover, now Ubuntu is an adware.