Your own barometer is all you have to go by, and often what makes a good director is knowing when not to say something. On occasions you can find yourself on a film set where the person who is wearing the director's hat is only trying to justify his position.
A good director creates an environment, which gives the actor the encouragement to fly.
The importance of the assistant director cannot be overemphasized.
Good evening, ladies and gentleman. My name is Orson Welles. I am an actor. I am a writer. I am a producer. I am a director. I am a magician. I appear onstage and on the radio. Why are there so many of me and so few of you?
Collaboration is just, really, a group of people getting in a room with their eye on a very similar prize and wanting to come out with the same show. The director, ultimately, is the guy in front of whom the buck stops. So, he has to have the courage to prevail. But, he has got to have a huge amount of respect for his collaborators.