Surprisingly for a choice that I realize doesn't really matter, it still ends up burning alot of time researching.
Intially looked at Bazzite, which seemed great other than I wasn't a fan of it immutability, I've had to remove the read-only property from my steam deck a few times.
Then I looked at CatchyOS/Arch, decided to avoid that as I know I'm too lazy to read notes every update, and while I don't mind tinkering and fixing stuff.. I want it to be on my schedule lol.
Avoiding Debian, my server currently runs it, but I remember it giving me headaches installing older JREs on it to run modded minecraft servers.
So I'm going to try OpenSuse, not for any real valid reason other than the last time I tried Linux as my daily driver ( 2004/2005) it was the first distro that worked smoothly without any driver headaches.
True, thats part of the reason why I didn't try it. Bazzite seemed much closer to being truely immutable, vice the "read-only" safety rails SteamOS gives you. I like to tinker too much to put it on my own machine, but I'll probably put Bazzite on my son's gaming machine next time I upgrade it.