There’s no such thing as an interesting character; there are only interesting character relationships. But, as is true for religions, myths, and the longest-lasting dramas, the structure of most memorable dramatic plots centers on a single individual, around whom all the most important action and the other characters revolve.

Memorable films tend to be a compensation for what we don’t see much of in the real world— justice, commitment, and altruism. Film drama frequently treats the central characters as if they were heroes or villains, but often the two are very much alike.

In almost every memorable film, things are not what they seem, and learning the truth about characters and situations creates much of the tension in the film. Often, the truth of the film is quite paradoxical, which is what makes us want to keep watching.

Although it’s often said that in order to succeed, a Hollywood film has to have a happy ending, when you look at the most memorable love stories it’s astonishing how many of them end with the separation or death of one or both lovers. Often, the paradox underlying the film helps explain why they stick in our memories.