Love OpenBSD, it is my main work and personal OS. Doesn't rank the best in performance, but certainly good enough for my uses (and many others, I'd guess).

The thing I like is that almost everything I've invested in learning about it over the past 15 years still applies. Stuff that does change, or is added, tends to be done in a way that is sensible and consistent with established patterns and practices. Linux, not so much.