Out of me and my partner I'd be inclinded to say I have the more dominate personality as in imagine I'd be the person you'd notice first between us but as far as the relationship goes we are very much on equal footing.
Out of the pair of us, I'm more assertive. I have no trouble asking for what I want or need. I'm much more extroverted, optimistic and more likely to call someone out on their behaviour.
Where as he is quieter, thinks everything through, and if he is upset will hold it in and dwell on it. He is very good at making plans, and I know I can completely trust and depend on him.
We make an awesome team, and each of our strengthens and weakness' balance each others out.