I stick with KDE (Kubuntu) after using GNOME, KDE Plasma, and Cinnamon. I think GNOME lack some settings available in KDE, KDE is the most customizable with a good default, and back then Cinnamon doesn't have Wayland that some of my apps, especially Waydroid, need. The only thing I hate about KDE is the wallet that keeps popping up by default. GNOME keyring is better IMO. I'm a heavy terminal user tho, for automation with bash script and easier copy-paste from Arch Wiki etc., so mb I not quite representative on DE.