Leaders need to know what they believe and why. Then they need to be transparent about both and be prepared to enter into conversations about them. Nowhere is this more critical than in the realm of ethical decision making.
DISC provides invaluable skills for developing teaching relationships.
Being able to see the detail is invaluable for success. C Type people deliver insightful analysis and spot unintended consequences.
The S personality type will offer loyalty and support, but let them ease into change.
Leadership is about influence. People oriented fast paced individuals can be great leaders.
Being dominant and assertive can be very positive characteristics; but knowing I am or you are can certainly ease communication and increase understanding.