Did the primary trio get old on you?
We have to admit that, as much as we adore Harry Potter and his two best friends, we would loathe them if we had to go to school with them. While they did manage to save the world, hearing about how heroic they were all the time would get old.
All the other students seemed to exist in the shadows of the three great wizards Harry, Ron, and Hermione, and it seemed as if the teachers only cared about them. The other children are also deserving of love! Rowling, pay attention to them!