The different BSDs aren't distros, they are different kernels that are developed in parallel. Obviously there's shared history there, and some shared userspace, but FreeBSD and OpenBSD aren't just two different BSD distros of largely the same software.
If you're curious about what unix is and what a bsd is, I would recommend netbsd or openbsd in a vm.
Besides GhostBSD, looks like there's also Lumina, MidnightBSD, FuryBSD, and TrueOS/Project Trident?
yes, i would define them very much as experimental
It was a neat experience and worth doing.
I can't even fathom how many times I've made a mess from my impulses to tidy up my system and it just manages to "fix itself".
There are also a lot of neat things, like being able to use multiple versions of GCC side by side. Not every distro behaves well on that regard.