I love KDE and think it is the best Linux desktop in terms of features and customization. Unfortunately it's just so damn buggy. Not in in unstable way, but there are just enumerable ways you can break it. It gets to the point that when you try something new that it has, you pause and think "Is this gonna break or stop working thus ruing my workflow again?"

It's why I went back to cinnamon. I mean in the realms of the phrase "Fuck, marry, kill", I'd fuck KDE, marry cinnnamon, and kill MATE.