[theideaofcoffee]

Agreed. Once you've gone pf you'll pine for it when working with anything else.

[kstrauser]

I've gotta me-too this. I've written any number of firewall rulesets on various OSes and appliances over the years, and pf is delightful. It was the first and only time I've seen a configuration file that was clearly The Way It Should Be.

[bigfatkitten]

The only configuration language I like more is Juniper. I picked that up and became fluent in it within about a day.