I've just completed one of those lengthy Myers-Briggs type personality profiles and it transpires I am ISTJ (or Introverted Sensing Thinking Judging). Nothing in the description I would disagree with, though amused to see I am only 16% "agreeable" and 62% "neurotic".
16% agreeable? Plenty of time between now and 7 May to get that down into single figures!
Here's the link if you are interested: http://tests.e-psychometrics.com/personality.html