Since this thread is still going on I'll report that I'm a long-time INTJ ("the scientist"). But while my N, T, and J have been consistently pronounced, it seems that my I has been drifting slowly toward E over the past several years, making me increasingly close to being ENTJ ("the executive"). But thankfully not quite there yet (it seems a strange characterization to me).

Say what you will about the MBTI -- and believe me, it's definitely been said -- but at the very least it appears to have good test-retest reliability.