By day, I'm just a quirky, but mild-mannered, software developer, ...
... and by night, a quirky, but mild-mannered, software developer who's a little more tired than I was earlier.
I'm on Facebook, but I only accept Friend invitations from people I know.
I'm on LinkedIn, and I connect with any technical people as well as friends. I rarely connect with recruiters.
I'm on Twitter. Right now, anyone can DM me, so it's a good way to get hold of me quickly if you don't have other ways.
I also have another website that I use for professional and technical stuff: