OpenBSD is an awesome piece of software. One OS that, to my limited understanding, clearly demarcates userland and kernel boundaries. And if I recall correctly, a critical X related bug was patched in OpenBSD during a regular code audit. Clearly, they have very good security and audit practices in places.
However, there was this one incident when Theo trained all his salvos on this one kid who had the audacity to email the list about his pet project which was an extension of OpenBSD of some sort (open source of course). Technically, Theo was right. But his style rubbed me the wrong way. I have since then discontinued using OpenBSD.