 I've always had a thing for these Swiss machine pin header sockets. They're much shorter than common square pin male and female headers, so they make much lower profile connections. And breaking apart a strip of machine pin sockets is actually a clean process. Not that ham-fisted chopping thing you have to do when trimming regular headers. Inevitably sacrificing one pin. Machine pins also get along well with breadboards. They don't tend to stretch out the internal springs like square pins. And they securely hold a through-hole component lead, at least the thin ones. They even make good IC sockets. In fact, I'm such a fan of these things that I actually made a machine pin breadboard at one point. It works for the most part, as long as you use the right gauge jumper wire.