MBTI is a scientifically proven personality test. ESTJ is one of the 16 types.
ESTJs are take-charge people. They have such a clear vision of the way that things should be, that they naturally step into leadership roles. They are self-confident and aggressive. They are extremely talented at devising systems and plans for action, and at being able to see what steps need to be taken to complete a specific task. They can sometimes be very demanding and critical, because they have such strongly held beliefs, and are likely to express themselves without reserve if they feel someone isn't meeting their standards. But at least their expressions can be taken at face-value, because the ESTJ is extremely straight-forward and honest. ESTJs learn best in structured situations in which the objectives are clearly established. They like schedules or agendas so that they can plan ahead. It is important for them to know the time frames, the course content, the requirements, and when papers or projects are due. It is not sufficient to know that a short paper is a class requirement. The ESTJ wants to know things like an appropriate topic or two, the number of pages, and the due date. ESTJs like plenty of advance notice and dislike changes in class schedules. However, when the teacher's authority is established, these changes may be tolerated> Their idea of a good teacher is one who is consistent, fair, and applications oriented. Because they are logical, they expect logically that relationships will have ups and downs. They firmly believe that with a proper foundation, their relationships will survive expected down times. Because they expect this, they may ignore helping their partner or examining their relationship during those down times. In some cases, this inaction can be detrimental to their relationship, and in some cases, not. ESTJ's generally are loyal to their institutions, work, and community and make excellent, faithful mates and parents. They see where their duty lies and are not likely to shirk the doing of that duty, even when this requires considerable sacrifice on their part. They frequently rise to positions of responsibility in their jobs, in the community, and in their religious affiliations. They very often belong to several civic clubs, and support them both through steady attendance and through their spoken attitudes. ESTJs themselves are punctual and expect others to be also.