Characters
Sometimes when watching a film or television programme I am amazed when I realise that the person I'm watching actually isn't what they portray on the screen. Some actors carry the mantle of their characters so well that you could imagine them being exactly that; like William Christopher from M*A*S*H. You can see him as a real priest. I don't think it's acting ability alone, but also manner, carriage. Of course, there's the flipside; as much as I can see him as a priest, I can't see Tom Baker being one, but he trained for the priesthood.