Whats the difference between a good actor and a bad one?

A good actor makes their audience forget they are holding a program or bag of popcorn. A good actor lives in their role, they listen and persue objectives and use their body to create different people. They have a specific history and specific relationships with each of the different characters. Their fellow actors trust them as artists and enjoy working with them.

A bad actor doesn't listen to their partners, they care more about making a good impression than telling the story. They try hard to make the audience laugh, they try hard to make the audience cry. They don't have the talent to live in the character. A bad actor is someone other actors don't trust.