I see these posts a lot, but this really does not match my experience. I find I run into many more bugs in kde than in gnome or other desktop environments. This bug made kde absolutely unusable for me: https://bugs.kde.org/show_bug.cgi?id=365255
(I think this bug is still present in X11, but I've moved on to Wayland.)
The other bug I run into constantly is that "exposé" sometimes makes all the windows invisible. The only fix is logging out and logging in again. I've seen this across a number of different distros. Gnome is mostly boring and just works for me.
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