Each letter in the personality type code - E, N, T, and J - describes a preference for a way of thinking or behaving. There are eight styles and you use all of them, but ENTJs prefer:
Extraversion (interacting with people) more than Introversion (thinking things through)
iNtuition (perceiving new possibilities) more than Sensing (perceiving tangible facts)
Thinking (making decisions using objective logic) more than Feeling (making decisions using subjective values)
Judgement (an organised lifestyle) more than Perception (a flexible lifestyle)
If your closest personality type is ENTJ then you are looking to develop a better structure and organisation in the way things are done. You tend to control life by organising systems and people to meet task oriented goals, but you also have one eye on the future and are looking for a process of continuous improvement. You like to work with competent people who, being in the right roles, have the appropriate skills both to do their job and implement the improvements you envisage.
Stereotypes and Individuality
The original author of personality type theory - Carl Gustav Jung - said that everyone is individual and unique. The personality types are not strict classifications, but stereotypes that are akin to landmarks on a map. Just as a few landmarks can help you find many unique locations, so too the personality stereotypes can help you understand your unique personality.