IDG Contributor Network: Project leadership vs. just being loud

You know the person or co-worker. That individual who complains more or shows more anger and aggression or is louder or whines more than the others around you or in the company or department. Is this person a leader? People seem to comply with their wants, needs and demands. Co-workers and employees of this person aren't pushing back or refusing to do the work this individual has bestowed upon them.So is this person a good leader because people seem to be following him? Does he have their respec