People with a high D personality type like to be in positions of authority or do things on their terms. These people tend to be risk-takers and self-starters, as well as extraordinarily goal-oriented and competitive. Furthermore, D style personalities are excellent problem-solvers, big-picture thinkers and tend to respond well to logic, reason, and information (but not emotion). The D-style has high ego strength, which could be perceived positively as confidence or negatively as pride.
The Dominant personality style has an innate fear they will be taken advantage of by someone, especially by someone they trust. As a result, they tend to strive for positions of authority to make decisions and control the environment.