ruBSD: interviews with Theo and Henning
Last December Russian tech giant Yandex organised first ruBSD event in Moscow. OpenBSD developers Theo de Raadt, Henning Brauer and Mike Belopuhov gave three talks on different topics. There were interviews with Theo and Henning recorded as well. Theo spoke about current adoption of mitigation techniques in other OSes and state of OpenBSD project. Henning gave a history overview of PF.
All talks and interviews available online and for download.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump