Well I love PF, and yesterday I finally got around to doing an iptables setup. While it's not as secure as I like, it's a start. Share your firewall and explain what it's for (desktop/server)! This is mine for my desktop that's running a webserver, DNS, and PGP key server here.

the -s 0.0.0.0/0 isn't really needed on all of them but otherwise it looks good to me

Yeah I know I just threw that in there so I can go back and restrict traffic to where I want it to go. I really suck with iptables :(

-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT

is preferred.