Please tell me what it means to be on your agents "A list" I myself assume it means you book alot of work? Something like that?

If you are on the A-List, that means the agent is working hard for you and that you are the first one they call when they have a role that fits you.

The B-List would be who they would go to if the guy on the A-List is busy... they don't work as hard for you.

It is largely based on how well you are doing; they like the actors that bring in the money.