I've used OpenBSD the last year or so (as a bastion/jump host for a few systems) after using *BSD systems very little for probably the past decade, and... good lord I love it so much.

Say what you want about the benefits of systemd or the usefulness of other parts of what is now unavoidable with Linux, and I won't argue with many of them, but OpenBSD just feels like a *nix system is supposed to. `ps aux` is like 10 entries at first. `pf` makes so much sense. `man` pages are consistently incredible. The security/cryptography focus, managing services, pledge/unveil... so many things about it is just *chef's kiss*.

It's not and will probably never be a daily driver for me and it may not fit your use case for anything, but I highly recommend playing with it.