i've always really liked the personality theory of myers-briggs. well, actually, not always. at first i hated it because i thought it boxed me, categorized me as something without first consulting me to see if i wanted to be categorized.
but now i really like it. REALLY like it. my ENFP friends still really hate it...and thus verify their ENFP description :) . it helps me in at least four ways....
helps me understand myself
helps me understand others and my relationship to them (especially my marriage)
helps me help people in teams understand each other (communication, conflict, etc.)
helps me understand whole groups of people and organizations
this last one is really interesting to me. it seems like you can really understand whole groupings of people by MBTI. this especially helps me understand christian denominations and churches. for example...
~churches that value emotional worship and future-oriented/inspirational teaching (charismatic/pentecostal) seem more NF.
~churches that value doctrine, tradition, and right teaching (baptist, bible churches, conservative presbyterian) above all seem more ST.
~churches who really value service and social justice (more mainline churches) above all seem more SF.
~churches who like ritual and other hands-on worship styles (anyone with icons, statues, candles, etc.) seem S.
(i'm just not sure where NT fits? i am an NT and i don't feel like NT fits anywhere...or better, it might fit uncomfortably almost anywhere :)
i know there's more to church groupings than that. (like socio-economics!) but this perspective really helps me understand groups more. i think ideally, the church shouldn't be grouped by personality types and gifting. but that's just how it is most of the time.
most conflict in church beliefs and between church leaders i think can be partially viewed through mbti. for example, in the emerging church, mark driscoll....high T....brian mcclaren....F. for that matter, it seems most people in emergent village, F, modern christianity, T.
here's a really weird thing to me: i believe that personality is mostly wired in us by God. so if we are drawn to certain beliefs, values and denominations because of personality, it seems like personality might predispose us in our beliefs. i'm still getting my head around that. in any case, this perspective helps me have more grace than judgement on those different than me and if it helps me love like jesus, i'm excited about it. i think if i ever wrote a book, it'd be on something like this.....
you can take a uncredentialed, free version of the test here.... http://humanmetrics.com/cgi-win/JTypes1.htm