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.)

I use Debian with a patched version of motif window manager. The 90s never ended:

Slackware

I was a distro hopper once, then I saw the light of NixOS…

NixOS everywhere (except for one server which I have yet to migrate from Rocky to NixOS)

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

I use Arch Linux with KDE Plasma myself

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

arch

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 :)

Manjaro for the best 🥰

Ubuntu for life. Unpopular opinion i know, please don’t stone.

Debian 12 for now is a great investment for the next 5 years, tho.

Arch baybeeee 💯💯💯

NixOS. Declarative config with opt-in state is awesome.