[h1d]

Practically I don't really see BSD better, as Linux is more widely used in commercial spaces which means more readily available packages, more edge cases solved, more results on Google and more jobs.

But if you want to be educational and use the OS which invented OpenSSH, pf (firewall that is far easier to read than iptables) and many other useful tools, then you might want to give a go at OpenBSD. It's fun to run it as your home router.

If you want to try zfs without being awkward due to licensing concern and thus cannot be distributed from Linux vendors directly, then FreeBSD is a good choice. NetBSD, I never tried but code seems clean to support quite a range of hardware platforms. DragonflyBSD, is more like a research OS to innovate on new features.