I think what makes a good actor's director is the same thing that makes a good director. Acting is just one of the trades necessary to make a movie.
“After the war, there was no industry. We lost the war. We had our whole city destroyed. No money. No studio. No film. No camera. No equipment. We would shoot in the street. We had no actors. Nothing. But we wanted to do movies. And we did the best movies in the world.”