there is a test called Meyer-Briggs/Kersey type testing.... it divides people into 16 different groupings... while still a JW I took this test and came out an
ENTJ or Extrovert iNtuitive Thinker Judger my opposite would be Introvert Sensor Feeler Perceiver or ISFP. mixing and matching brings the other 14 types....
after ten years of not being a JW and changing a lot of things about how and why I do things, I still tested exactly the same.
which reinforces a study I recall regarding twins raised apart... the finding was that 50% of their personality was genetics [since they could not pin it on anything else] and 5% was direct influence by parents and 45% was life experience and especially ones peer group influences.
on a side note, I tried taking the test as if I were Jesus from the bible as best as I could imagine his answers to the questions and it came out to a type [I dont recall exactly which] that was very well suited to such things as a nurse, a doctor, a clergy man, etc.... as I was a JW at the time, my first thought was to realize that JWs, by trying to force all 16 types into just one type [having Jesus as our exemplar] was a sure fire way to cause 15 different types massive internal stress.