I love this question!
The "Vulcan" part has to do with how I always identified with the Vulcans of Star Trek; unemotional (actually in my case a touch alexithymic) and very analytical.
"Chris" actually has nothing to do with any part of my real name. I lived in America during the most recent election, and for whatever reason people from either campaign would call me and say, "Is Chris there?". I also got calls from random people asking to talk to Chris, who is probably some random person witha similar phone number. For some reason it amused me that I had absolutely no idea who Chris was, or whether Chris was even male or female. It occurred to me that because every third person in the world is named Chris, it would make a great anonymous nickname.
And ChrisVulcan was born. Chris Vulcan is also a pseudonym under which I plan to write a book.
_________________
Well, I was on my way to this gay gypsy bar mitzvah for the disabled when I suddenly thought, "Gosh, the Third Reich's a bit rubbish. I think I'll kill the Fuhrer." Who's with me?
Watch Doctor Who!