Design Dragon Psychology From First Principles
Don't write a dragon by starting with the scales. Start with what it would feel like to be ancient, physically dominant, and intellectually curious without the social structures humans use to organize reality. Your dragon doesn't experience time the way a human does. They may not experience mortality as urgent. They may hoard not out of greed but because objects are the only things in their long life that stay in one place. Build the psychology first, then derive the behavior. A dragon who is patient because they have centuries to wait is more interesting than one who is patient because dragons are patient.