I like the UX KDE gives over Gnome. It feels way more like a personal computer, something that you can modify and do multiple tasks with.

Gnome is a lot more limited in functionality, but it's also a lot more stable. KDE is buggy and has a tendency to crap the bed a few minutes after startup, which never happened to me with Gnome.

It's a though decision, but lately I've been thinking of switching back to Gnome.