Not counting the Steam Deck, since KDE isn’t actually turned on while you’re running games.
Normally I’m a Gnome guy, but I’m building a tiny low power portable computer and wanting to keep resource utilization low, so I’m investigating other options.
KDE on my desktop, GNOME on my laptop. I like both, but I like to tinker more on my desktop, where I have good internet and can do a bunch of downloading and customization comfortably at my desk. With my laptop I want it to just work (and I hate KDE’s defaults) so I use a mostly vanilla GNOME. Also has good trackpad integration so that’s a bonus as well.
I did have a heavily kitted out Arch with XFCE on my laptop before, but I reinstalled my OS because something broke and it wouldn’t boot and I couldn’t be bothered to troubleshoot and just wanted a working laptop lol so I installed Endeavour with GNOME and have been happy