aggressive, militant, assertive, self-assertive mean obtrusively energetic especially in pursuing particular goals.

aggressive implies a disposition to dominate often in disregard of others' rights or in determined and energetic pursuit of one's ends.

militant also implies a fighting disposition but suggests not self-seeking but devotion to a cause, movement, or principle.

assertive suggests bold self-confidence in expression of opinion.

self-assertive connotes forwardness or brash self-confidence.