I have a few machines, which run:
- Raspbian Bookworm (arm64) with IceWM - Raspbian is the only desktop RPi distro that works out-of-the-box. I chose IceWM because it's fast, light, customisable, and I can make it look like it's 2004.
- openSUSE Tumbleweed with Xfce+Bspwm - I keep going back to openSUSE. It just works. As for the desktop, I wanted Xfce but with tiling.
- Mageia 9 with LXQt - I just needed something lighter than Fedora Xfce, as this machine only has 4GB of RAM.
- FreeBSD with i3 - Thought I'd give BSD a try. I was pleasantly surprised.
- Gentoo (WIP) - I'm just throwing random distros at my MacBook until something sticks. Gentoo is fast and can control the fan without me having to git clone and compile the drivers (ironically).
- crunchbang++ (i386) with Openbox - This is a mid-2000s MacBook, running one of the few Linux distros that actually boots on it.
Some distros I tried but did not like were Pop!_OS, Slackware, Zenwalk, Freespire, Redcore, Fedora Atomic, ArchBang, and antiX.
Sone distros I'd like to try are Qubes OS, Clear Linux, CRUX, Kwort, Paldo, Exherbo, NuTyX, T2, Chimera, Adélie, Frugalware (no new ISOs since 2016, but the packages are still updated), Dragora, Parabola, Hyperbola, PLD, KANOTIX, Calculate, ALT, ROSA, and AUSTRUMI.
The reasons I have not yet tried these are mostly down to my limited hardware and the complexity of some of the distros. With others, it's often down to WiFi drivers not existing for my proprietary cards. And then there are also a couple of distros from Russia, which I feel I can't trust at the moment.