This article is about the Myers-Briggs personality type. For the Socionics ESTj, see Logical Sensory Extrovert. ESTJ (Extraversion, Sensing, Thinking, Judgment) is an abbreviation used in the publications of the Myers-Briggs Type Indicator (MBTI) to refer to one of sixteen personality types.The MBTI assessment was developed from the work of prominent psychiatrist Carl G. Jung in his book Psychological Types.he MBTI preferences indicate the differences in people based on the following: 1  How they focus their attention or get their energy (extraversion or introversion). 2  How they perceive or take in information (sensing or intuition).