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.
Having successfully convinced me to move away from Xfce after GNOME 2 was deprecated, my main DE has been MATE for such a long time. However, I am being wooed by KDE Plasma lately. I remember running Plasma 5.26 on Slackware 15-current and was blown away at how snappy it was on an old Dell Latitude E6410 with a 1st-gen Core i5 520M! I can only imagine how nice Plasma 6.x is in comparison.
MATE has also been stable for me on the BSD side, running it on OpenBSD and FreeBSD, but Plasma might woo me away on there as well, especially once Plasma 6 is available on OpenBSD 7.6.
I also prefer to run Fluxbox on much less powerful hardware, regardless of the OS it’s on.