Average Helper! Enneagram Personality Types, as mentioned in the earlier post, is a personality test system that is used to display how different kinds of emotion play a part in driving the lives of people and determine how a person engages with other people. As far as the Enneagram levels of Development are concerned, it provides a framework of how different traits are included in each type of personality fits into the overall structure and these levels are necessary to understand how all of the traits are interrelated.