There are advantages and disadvantages to being a loud and quiet person (these are relatives, correct me if I'm wrong)
The loud person is seen as more confident, assertive, taking action but the downside is that they are unstable, too emotional, controlled by their external environment, likely to be in trouble.
The quiet person is seen as more in control, can handle crisis situation, smart, not engaging in foolish talk, successful in the long run and successful behind the scene or not obvious. But the downside is that they are easily looked down by society, seen as weak, not confident, not taking action, having too much patiences, easily forgotten.
Hmmmm, perhaps the point here is that the ideal normal person should have a balance of both loud and quiet. And not be too stuck on one end or the other end. So then the person has all those above qualities. And what's really powerful is that the person has the freedom of choice to switch between qualities depending on the social situation.
Remember, your views and what you have to say matter to others AND to yourself