Why would anybody want to listen to what you have to say?
From here
  1. because you help them
  2. because you entertain them
  3. because you make them hopeful and/or enthusiastic
  4. (maybe) because you say things they would like to say but cannot say

This is one of the many passages and charts Alessandro finds in books and articles on a daily basis. They span many disciplines, including:

Alessandro occasionally adds a personal note to them. The whole collection is available here.