@shupfel@mastodontech.de @tara@hachyderm.io for me it's pf. Why - just because I use it everywhere and I like to reuse my configs. If it makes sense to learn pf (which is imho really easy compared to iptables at least), is what your personal goal is?
Learning -> do it
Switching to BSD -> do it
Running BSD based servers -> do it
Just playing around -> forget it