So many distributions impressed me, but I think gentoo, nixos, Guix and Alpine impressed me most. Maybe Zorin with its beautiful design for newcomers.
If I had to pick one, it may be Alpine. The idea of having a fully usable OS with so little is really impressive. It even has a fully functional build system similar to Arch's ABS (on which the AUR is based)
Gentoo, nixos and Guix are really impressive and make computing a pleasant activity.
I run jellyfin on bare metal because it makes it easier to debug imo, but I do use docker for caddy and some other little applications (like a tomcat instance for example)
Poke around with Caddy on bare metal
Idk if it is something I was doing or just placebo from my head, but Caddy is a lot faster on bare than Docker in Alpine
Tho the drawback is having to manually set-up logging if you need (otherwise g'luck with whatever it decides to throw at syslog)