What's the appeal?

Appeal refers to the charm of the character, the personality the character displays, thus making it important to have so an audience not only knows where a character stands but can like the intended hero and dislike an intended villain. This is immensely important of a factor in story telling.
Experimenting with the poses of a character in various stages of emotion can help with a characters image, like if they are sad have their faces pointing downwards and the camera angle focused at the top of their head to make it seems as though the character has the world weighing down on their shoulders.
Contrast to a characters normal habits helps to add to the story by giving a certain shock value, like having a character that was considered to be unfeeling burst into a sudden fit of emotion whether it be anger or tears.