Debian is mine and has been for decades + I’m a little bit happy to see it’s still well represented / well thought of in the community. Everything works, and you can choose new + exciting with headaches sometimes, or old + stable with no headaches but old.
Only real issue is the package management hasn’t kept pace with node / python / go / everything else wanting to do its own little mini package management, and so very occasionally that side is a little bit of a mess
NixOS I would like to try at some point as the core philosophy seems a little more suited to the modern (Docker / pip / etc) era, but I never messed with it