How do you know you are dominant or have the potential to be dominant? How do you feel when you express your dominance?
I examine my inclinations, behavior, and attitude; it was as clear to me that I am a dominant as an examination of my primary and secondary sexual characteristics and behavior reveal that I am a male. I get a lot of satisfaction and happiness from my dominance, especiall in the company of those who provide joyful and willing service. I believe tat we all serve, and that my service as a Dominant should be (and is!) as fulfilling as a submissives service, but more on that in another answer.