I sing, not arms and the hero, but the philosophic man: he who seeks in contemplation to discover the inner will of the world, ininvention to discover the means of fulfilling that will, and in action to do that will by the so-discovered means.
In displaying the psychology of your characters, minute particulars are essential. God save us from vague generalizations! Be sure not to discuss your hero's state of mind. Make it clear from his actions. Nor is it necessary to portray many main characters. Let two people be the center of gravity in your story: he and she.
Making music clips, I have a responsibility to depict the artist in a way that suits them, and feels comfortable with how they want to present their music. From there I usually try to tell a story visually that complements the music, that lets the music be the hero element of the project. I just try to do something that feels sincere and creative and a little bit home-brewed so it doesn't feel too plastic or phony.