jag, for my opinion kde 4 is the worsest and i< never ever again will use any distro who uses kde 4. I is hard to configure, it is alot less good then kde 3.5, kde 3.5 was really good and easy configurable, I tried a few time to use kde 4 and just don`t get along with it, so thats it.
Also it is extreemly slow, Gnome desktop is very fast and my favoite Desktop and i< can configure it as my liking.
This is my opinion, but everybody likes something different.
Enlightment is a nice desktop too, but never kde 4