Appeal is like the charisma of a real person. It’s the sum of everything that makes a character in an animation come to life.
Appeal is about trying to make characters and objects more interesting. It’s about giving your animation a certain “je ne sais quoi,” something enjoyable that’s difficult to describe.
This principle is about the whole being more than the sum of the parts. If you consider all the other principles, you should at least find yourself on the right path toward appeal.