Concentration is key in performances as the actor should be constantly thinking like the character and not themselves, although they may think there personality is like the character you still have to show it isn't you. By looking at the audience and making them totally aware your doing it is not what a professional actor what's the achieve, although as Stanislavski said ignoring the audience isn't right either, due to them being a 'co-creator' of every performance. I believe that getting the right balance is difficult as many actors will not know wether they are paying to much attention to the audience or none at all. Stanislavski method in finding a way to get the actor sufficiently interested in something (for example, an object) on stage
