Years ago I took the Myer-Briggs Personality Type test, which is based on Carl Jung’s Personality Types, and I got an INTP result.
I took the test again today, and voila! got INTP-A again, so I used another site with slightly different question wording, and got INTP-A once more… so I would say that at-least as far as this test is concerned, the results are pretty consistent.
I read the generic description of the INTP type: http://www.16personalities.com/intp-personality and found it to be fairly accurate, a little like looking into a personality mirror. I don’t really put a lot of stock in psychology in general, since so much of it is subjective and based on the flexible opinion of whoever is writing the book, and very little concrete logical analysis, but I have found the Myers-Briggs test fascinating, and I do have respect for Jung -much more than for Freud at-least. Jung seems more down-to-earth and more fascinating than his more well known colleague: Freud.