A person has to have the aptitude to act . Actors took moment to act . Not part of story. Actors tried to make every scene the big one, actors act to be liked by audience. Director has to watch this.
Director has to keep things in proportion.
And feel free to try all different things. Act with your body, not just your feelings and your mind , let your body behave too. Audiences imagine more in their head than you can ever act out. Audience will do it for you, their imagination is great. Bigger than life energy.