People with a strong D personality style like to be in positions of authority, or where they can do things on their own terms. These people tend to be risk-takers and self-starters, as well as extremely 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 D 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 where they can be in charge of making decisions and controlling the environment.