If you are the one who's always calmly fixing things while others panic, or if you've taught yourself how to pick locks and hack databases out of sheer boredom, you may be an ISTP.

If you are enjoy color-coding your Google Calendar, have never missed a deadline in your life, and believe 90% of the world’s problems could be solved with a simple process improvement, you may be an ESTJ.

If you actually read the Terms and Conditions, file your taxes in February, and tend to keep everyone from accidentally burning the house down, you may be an ISTJ.