This free test is based on Carl Jung’s and Isabel Briggs Myers’ typological approach to personality. Pretty damned accurate for me:
http://www.onlinepersonalitytests.org/mbti
leo @'d me in a thread about his last dream, stating he was passionately making out with a guy he used to know and then woke up while reaching for his crotch, and said that i would "know who 'tf' it is"
and of course i know, it's luke