INTP here. Interestingly, in the big 5 tests favored by psychologists as they don't like tests based on metaphysical concepts, the results are quite similar to INTP except I come out as an extrovert. I chalk that up to I am a not shy introvert. Also, I recognize that each of the MB letters results from placement on a spectrum. Recall that for the I-E spectrum, I'm closer to the middle.