Cat has tagged me, so here are some weird things about me:
1. I don't watch television. Katrin and I don't have cable, and both of us spent most of our adult lives not even owning a TV set. This isn't a coincidence; it's one of the reasons we were set up by a friend in the first place. This often comes up in conversation (have you seen x-and-so commercial/trailer/show,) and is downright shocking to some people.
2. I have an affliction common to many computer programmers - we will spend hours writing a program that will never save us five minutes of work. This is totally illogical, but I guess we just enjoy building something and look for any excuse. This extends to other areas of my life; I'll fix things or build things that anyone else would just buy.
3. I make stuff out of cardboard. It's a cheap, light, easy to work with, and readily available fiber composite. This got me some laughs at work, where I made computer stands and a housing for an industrial printer.
4. Like Cat, I rehearse conversations in my head - but I cheat and repeat things until they're just right, so they always wind up sounding better in my head than any actual conversation I might have.
I can't think of anything else! I went to a lot of trouble to be weird in college, but it seems that I've turned out normal anyway.