Arch Linux. Many people said it is unstable and hard to setup. It turns out very stable as long as I update it frequently and AUR makes installing software easier. Even easier than ppa-based ubuntu as it will destroy your dependency if you are not careful. Lol.
Neat. As I am in the process of fully migrating to wayland, it is good. I only work as a teacher, so I don’t really concern about licensing, lol.