GNOME. I gave KDE a shot two or three times this year and I found it a bit too clunky and awkward from an aesthetic perspective, and incredibly frustrating & tedious to set things up in a familiar, equivalent manner to how I had things with GNOME (keyboard shortcuts, dock, top menu bar, window zones, switching workspaces, some Wine settings, and more). I spent more time trying to fix and alter things rather than be productive.
I use Fedora, for what it’s worth.