seemed a bit more accurate than a lot of them:
Ooh, you're a dark one. Sitting in the corner, singing to yourself, playing with matches and twitching. Most of the time you instinctively avoid company, and if you're forced into close proximity, things do not go well. You can probably stop stabbing that teddybear now. It's not going anywhere.
What's your malfunction?
Change "blood type" to "chilly" and "organ donor" to "not till I'm dead", and it's bang on target.