Mageia is one I really liked, but felt limited with the package manager, or more precisely the repository.
I will definitely try it again. It seems so solid yet underrated. I love that it uses .rpm, because it opens up a world of software without the pain of installing from an archive.
I do not remember, probably something I don't even use anymore.
Anyways, stability is more important than anything else. I don't want to be good at troubleshooting my OS, I just want it to work! I have gotten comfortable with installing software manually.