My favourite DE has got to be Cinnamon, as much as I like KDE and XFCE, I prefer the simplicity of cinnamon where as in KDE has a bit too much of everything in the customization scene and XFCE I find a little tricky to get tiling working right.
Cinnamon to me is perfect as I easily transferred from Win 10 to Mint and soon Manjaro Cinnamon Edition.
What is your favourite DE and why? Tiling WM DE’s can be counted as well seeing as they have nifty navigation features.
Gnome for its looks, simplicity and intuitive ways, but after Plasma 6 release, KDE seems to be up par with Gnome’s UI/UX so at the moment Plasma ia my favourite desktop.
As for WMs I tried i3, Sway, and Hyprland. Overall Hyprland is my favourite because of its special workspace mechanics, customization and options. But if looks had no value to you and you like Sway’s scratchpad mechanic then sway is for you (plus its documentation is mostly clearer, better organized and well written than Hyprland). Btw I am not comparing their tiling because there are use cases for each person and you can acomplish each others tiling mode with plugins.