XFCE for the longest time, and Cinnamon recently.

KDE

KDE, but it doesn’t super look like it anymore.

Gnome here. Tried KDE and Cinnamon, but just found myself more comfortable on Gnome with extensions.

KDE Plasma

Sway for going on 2 years I think. I do recommend it, and Wayland/tiling wms in general.

I use my own fork that uses bspwm-style “long-side split by default,” and a nearly transparent under-the-hood container-squashing refactor that prevents this behavior from causing the tree to become bloated with invisible nodes and start to lag horribly. The fix won’t be accepted in Sway since it’s the bug is faithfully reproduced from i3, and I haven’t had time to rewrite it for i3. But if you use something like sway-autotiling, you’ve probably noticed the issue.

I use gnome and plasma. Recently more plasma than gnome but I switch between them when there are new versions to explore. :)

Cinnamon for a few years now.

Currently on hyprland after using sway for a couple years. I also don’t mind KDE - I just got the Pinetab 2 and I’m running Plasma Mobile on it. Though I’ve been wanting to try hyprland on that as well, maybe with one of the NWG launchers.

Gnome with some extentions

I usually daily qtile WM. If I run a full DE it’s either KDE or LXQT.

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TDE aka Trinity Desktop Environment, a fork of KDE 3.

I use Gnome with the pop-os tweaks: shell, launcher, and workspaces. Looking forward to the new COSMIC DE from System76.

Hyprland when felling tiled, Plasma or Cinnamon when I want some floating