Arch Linux because it has sane defaults, is rolling, up to date, helpful community, awesome wiki and is minimalistic.

OpenSUSE Tumbleweed. I like it for being a rolling release with quality control. On the one hand I don’t like its restrictive defaults but on the other hand I know enough to work with them and that’s given me a leaner system.

I like that the NixOS packaging system feels like it’s build for Free Software, making source code and Git repositories a first class citizen. You can simply drop a flake.nix into your repository and turn it into a Nix package within a couple of minutes, that’s quite a bit different than the utter headache it is to package something for Debian. Nix packages being free of naming conflicts also makes it very easy to mix and match whatever versions you need, something that’s basically impossible on most other distros unless you resort to containers or virtual machines. NixOS having the largest package collection of any distro is a plus too.

Relatively fast updates, AUR, PKGBUILD, Downgrade, the Wiki, the community, not controlled by some corporate entity, no telemetry, and last but not least the logo ;)