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

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

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

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

OpenSUSE, Tumbleweed on workstations (KDE) and Leap on my server.

Linux Mint. Nothing beats your computer just working when you have shit to get done.

Linux Mint with Mate DE.

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

arch

I use opensuse with kde and I love it. Have been using it for 2 years now.

For server use at home I use Ubuntu Server and Alma Linux (mostly)

At work it is all RedHat.

Slackware

Linux Mint for desktops/laptops (Cinnamon if the hardware can handle it, MATE if it's a bit long in the tooth), and Debian for servers.

I've used several distros (yes, even Arch btw) through the years but I just keep finding myself coming back to the Debian-based ones. I guess I just feel most at-home with the way it has things set up, or something.

I'm currently running Mint on my Computer and Ubuntu on servers.

Mint with Cinnamon is my daily driver on my desktop and laptop for almost 3 years now. I ran a company for a while using Linux and managed to find everything I needed for software to run administration. It was great. I still have a windows tablet for troubleshooting and equipment specific requests, but I always feel weird logging into it.

I've used Mint since I started using Linux, and never had any major issues. I've therefore just stuck with it. I don't always have the time to tinker with my machine if something should break, and Mint usually just works when I need it, while still providing flexibility when I want it (and Timeshift to fix it when I break stuff)

Linux Mint, it just works

OpenSUSE Tumbleweed on my laptop, Debian on my server and SteamOS on the Steam Deck.

I'm a opensuse tumbleweed user on my desktop and laptop. I also have an ubuntu home server.

I really like tumbleweed, but I have been thinking of switching to an immutable distro like guix or nix. I've tried guix several times and found it pretty good, but never stick with it due to its lack of KDE plasma support. Maybe I should give nix a try.

SUSE

Fedora, because it just works and it ships recent software versions.

I also like Fedora Silverblue, and projects like ublue are very interesting in my opinion.

Fedora on the desktop. I got my start on Red Hat Linux so I've stuck with it since.

For servers I use Debian. Lightweight, widely used, and gets the job done.

Ubuntu or Kubuntu. Long are gone the days where I used to tinker with different Linux flavors.

Fortunately, I can afford powerful enough systems so I do not have to be worried about optimizing every single aspect of the OS.

I want things just to work out of the box. I am aware that this applies to more distros than Ubuntu, but I just do not have the time and energy anymore.

Just Ubuntu. I have tried plenty of others but Ubuntu just seems to tick most boxes for me.

EDIT: I am looking forward to the new Pop! when it comes out, I will surely give it a try, No idea if I will switch then though.

I use gentoo everywhere, from my nas to my webserver and my pc and laptop.

With binhost and distcc it’s really not bad and the customizability is just unmatched.

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.

Arch on everything, including servers. It's just so easy to install everything via the AUR & configure everything easily. Plus the wiki is amazing. Although it is a pain to setup sometimes

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

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

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 :)

I use Arch Linux with KDE Plasma myself

Manjaro for the best 🥰

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 use Linux Mint XFCE on my laptop and desktop. And the standard Steam OS on my Steam Deck.

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

Arch baybeeee 💯💯💯

My laptop is on Manjaro and has been running flawlessly for years ...such a great experience with gnome 40+

My desktop is also on Manjaro, and things could not be more different. No Wayland, no animations in the gnome desktop, visual glitches since the last update ...guess it doesn't play well with Nvidia drivers. Anyone managing something decent with gnome+Nvidia?

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.