Not too ick someone's yum, and this ventures outside of Linux.
I dislike the BSDs. Great for getting pf, and not being a homogeneous shop, but just different enough to be difficult outside of one specific use case.
Gentoo was similar. It may be different now, but a pain on the Xbox.
Mint was too dumbed down and ugly.
Ubuntu is useful, but likely harmful with it's constant pushes to commercialize everything.
Redhat is needed for work, but the commercialization drives worse quality. Documentation seems purposely bad to drive training courses.
(Yes, I like Debian.)