Why are some people sweet and quite instead of loud and obnoxious?

Question: Why are some people sweet and quite instead of loud and obnoxious?
- Keywords:
  loud,
  obnoxious,
  people,
  sweet
Asked by Madison Lee to Candace on 6 Mar 2017.
- Candace Lewis answered on 6 Mar 2017:
  
  Interesting question! People’s temperaments are due to many factors, but one way of understanding people and the their behavior is to see it as a product of both their genetics and their environment. Maybe your friends who are loud have genes that make their voice easier to carry and maybe they have loud parents and so learned to be loud.