When I'm alone, I'm a talker. I am NOT a self-starter, I'm a terrible time manager, and I procrastinate like no other.
When I'm with other people, though, I'm a doer. I'm very logical, so I'm frequently the quiet one listening to everyone debate. And once I get frustrated that no decision has been made, I give a quick summary, assign tasks, and tell everyone to get a move on it.