For me personally: Something like Arch. I want to spend as little time as possible on installation and configuration, and I don’t want to have to read update notes or break my system. But I get that it’s great for some people, and their wiki is just next level!
In general: Ubuntu. It feels like I read something about Canonical causing trouble every other week, and don’t even get me started on snaps!
I always get the feeling that D&D’s Forgotten Realms is a more goofy kind of fantasy, like everything you want is possible. It’s about imagination and self-expression, rather than setting strict rules for how things work. Makes sense imo, they want it to be the world that you use to create your own stories for P&P games, so it should have many different facets and can’t be too limiting.