This is a test based on some psycoanalysis style that gives REALLY on the mark results. It places you in a set or archetypes, and theres two links describing the one you get at the end of the test, theres also some statistical thing, that turned out like this for me:
Introverted: 78%
Intuitive: 38%
Thinking: 1%
Percieving: 56%
I know the 1% thinking is pretty funny

http://typelogic.com/intp.html
http://keirsey.com/personality/ntip.html