Currently I am on KDE, but I am an xfce lover. I can’t wait for the next xfce update and for Cosmic.
I am living KDE almost default. I have the impression that with too much customisation problems come.
Xfce is rock solid and rock solid after customisation too. It is truly amazing.
Gnome needs far too many extension for me to be usable. And so I avoid it.
Cinnamon is great too, but it’s in the middle. If I don’t want to use Wayland, at that point there is xfce.
Opensuse Tumbleweed. Sometimes I try something else, but Tumbleweed is the one I keep going back to. It is quite solid and rolling release.