If you don't know, here is a no-bullshit test: http://www.michaelcaloz.com/personality/ Thanks to @Max_V for discovering this gem. Edit: 4 year old poll on MBTI types. INTP, INFP, INFJ, and INTJ types make up over 70% of the forum population.  Resources for INTP's Resources for INFJ's Resources for INFP's Resources for ENTP's