I couldn't let this pass without bringing up the Forer Effect [1]: basically, that people will believe just about any vague generalization as long as they think it's been tailored to them. For all of the "science" that goes into building the models for these tests (not just MBTI), any that rely completely on self-evaluation (especially multiple choice questions), should be taken with a huge grain of salt. They're fin…
The assumption that you can judge personalities from a Myers-Briggs test is rather silly. The test was constructed by non-experts based on Carl Jung's theories of psychological types. The "Criticism" section of the test's Wikipedia article [1] is rich in citations of how the test by and large doesn't test anything, except perhaps the I–E scale.
I admittedly kind of have an axe to grind on this test. I think it's a waste of time if you're trying to actually learn something, and especially dangerous when people use it for any actual purposes other than just personal fun.
1: http://en.wikipedia.org/wiki/Myers-Briggs_Type_Indicator#Cri...