I got talking with someone about personality stuff last night. I found a little test for it. It’s fairly short, but seems to be a pretty good judge too. http://keirsey.com/ and http://typelogic.com/ have some explanations of the different types.
The test said I’m INTJ. It doesn’t seem perfectly accurate (we all vary some), but it’s a pretty good description of me.
Your Type is
ISTJ