I have two, KDE on my laptop that runs Arch (btw) which is my tinkering machine, and GNOME/Pop!_OS on the desktop, which is the one other people use and I’m not allowed to break lol.

Although I might switch the desktop to COSMIC at some point if it doesn’t cause too much trouble.

Sway, will try the new cosmic once its in beta

KDE for its Wayland performance and features and occasionally I switch to hyprland if I need a more focused work environment.
In the past I used Cinnamon but it became ever more buggier on Arch and due to lack of Wayland support still it was a dead end anyway.

XFCE. Because I’m an idiot, and all my computers are old.

KDE, because despite my bitterness for the loss of Unity 8, I know it’s merely nostalgia for me. I want something I feel like I can make my own without too much difficulty.

KDE, it does what I want it to do.

KDE. Because of its simplicity. Unsarcastically.

Currently I am on KDE, but I am an xfce lover. I can’t wait for the next xfce update and for Cosmic.

I am living KDE almost default. I have the impression that with too much customisation problems come.

Xfce is rock solid and rock solid after customisation too. It is truly amazing.

Gnome needs far too many extension for me to be usable. And so I avoid it.

Cinnamon is great too, but it’s in the middle. If I don’t want to use Wayland, at that point there is xfce.

XFCE + Compiz

The unholy combination of accelerated 3D graphics and performance, all without the stupid drawbacks of wayland.

Runs much lighter than KDE even with all the 3D cube and windows stuff enabled.

Extremely customizable as well. XFCE already does a great job of UI/UX, it just lacks a compositor to add flare (xfwm4 has no animations, only some blur effects).

LXDE/LXQT because I grew up using potato computers and now I can’t stand it if my DE uses more than 2% of my hardware resources

though I am currently using KDE because for fuck knows what reason, Kubuntu is the only prepackaged Linux I’ve been able to get to boot on my weird Samsung laptop and I haven’t bothered to gut KDE and replace it with LXQT yet

Cosmic, just trying it out because i liked the extensions system76 made for gnome, and cosmic DE is more native experience of that.

Used Mint with Cinnamon for a long time, but always wanted to try KDE after distrohopping a bit. Had it on when I switched to Arch, but didn’t like how slow it felt on my old laptop so I tried LXQt and then XFCE. I wanted a modern lightweight environment with Wayland support, but I’ll have to wait for it to be implemented. In the meantime, I riced my XFCE just how I like it, and I really like how complete and responsive it is.

I have gnome installed and setup as a backup, plus I use its greeter, but I am another who does not really want a full DE and instead using Sway as my WM day to day.

I have two 32"@4k monitors so normal manual floating window management just annoys me, I greatly prefer tiling window management to auto sort my windows for me. Its extremely rare that I need to full screen anything on monitors this large to fit everything I want in width wise so I want multiple apps per monitor.

If all of this is managed dynamically for me, and I am not manually sizing or overlapping stuff, all the better. Couple that with easy use of multiple workspaces for different tasks (I typically use three per monitor), rarely do I have a need to manually resize anything. I have it setup to open my common apps on the right workspace for me, and each workspace set to the right layout for that set of apps, so much less faffing.

My (40%) keyboard(s) run QMK and are setup to enable most of my common combos, such as switching workspace, moving apps around are never more than two keys. The more I can do without moving my hands from the keyboard, the better for me.

Final thing is that Sway is wayland and for me extremely stable.