Debian. Several reasons:

• It’s trustworthy.
• It’s not going anywhere. Debian existed when I was a kid and it’ll probably still exist when I draw my last breath.
• I know how to use it, since, once again, I’ve been using it since I was a kid.
• It has all the desktop environments.
• It fully supports systemd. I do not miss the unreliability, slowness, and complexity of what came before that. (Normally I wouldn’t mention this, but your former distro of choice exists solely for the purpose of not having systemd, so it’s relevant this time.)

Slackware

Manjaro. I am a guy of habits, so I never really distro-hopped, I once tried to install Arch and failed to configure everything so I tried endeavour and failed too (which would mean I am not a tech guy either ;). Ultimately, I’d say that the distribution does not matters much once you are used to it, you can always get what you want from any of them. The only thing I really like in comparison with others is pacman :)

Does SteamOS count? My steam deck is my current “Linux” machine.

I use Arch Linux with KDE Plasma myself

I use Manjaro, but I run it like vanilla Arch (for example pacman/yay and not pamac). I find this to be a sweet spot for me - rolling releases are so incredibly nice, and Manjaro being slightly slower than Arch is good from a stability standpoint in my experience.

I use ZFS all over the place, including the root storage pool on my home server, which has overall been a great experience with systemd-boot.

I have a few dozen computers and most run Pop!_OS.

arch

Manjaro for the best 🥰

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I use ArchLinux with AUR and flatpak.

It’s just perfect for my potato laptop.

Moved from Arch to Nix and loving it!

Arch

I find that bugs in linux programs (and they will happen regardless of distro) are more easily tweaked in systems that do minimal modifications to upstream programs and keep them updated regularly with what the developers release

Also AUR makes it easy to install pretty much anything without having to add ppas, new repo links, etc

I used to use Void as my main distro, but then the developer drama made me shy away from it (keep in mind, this was like forever ago and I haven’t looked at Void at all since). After that I floated around trying everything, from Gentoo to the BSDs (I know, not Linux). Nowadays I use OpenSUSE Tumbleweed. I got tired of doing everything manually and OpenSUSE just makes everything so much easier to use, IMO.

Currently… Slackware on main laptop. Slint (Slackware-based) on mini-pc. MX Linux (fvwm respin), Void, and OpenBSD on old laptop. NsCDE is desktop on all except MX.