I've enjoyed reading this thread, but in a more serious vein I actually find it useful to have "Personal Cards" (vs Business Cards -- as I still have a real business). My personal cards have my non-work email, phone number, and street address. I find these useful at meetups, group bike rides, etc. When I want to engage with someone I've met for future activities, it's an easy way to break the ice without imposing any commitments on either side by handing them a personal card with my contact info.
It also helps someone remember your name and where they met you. If they're interested in getting in touch again, they'll have a handy physical reference. I don't print a title as I'm trying to avoid any snark or innuendo.