What they are casting?   

     Casting has nothing to do with what you are, it is what your personality emanates, it's what people react to you as, what you appear to be.  An actor to be a successful actor must learn to act on how to be what you look like or what you appear to people. In other words, your presence. You must find something that goes with your look. What is it that I see reflected in mirror. (Don't act in mirror.) How do people respond to me? We are not talking about what people really are, we are talking about what they seem to be. What you will be cast as? It's not what you really are, it's what you appear to personify. Again, it is what you appear to be, they cast according to what you emanate.

"In the end, it can't look like acting."