Film noir
Often, the hero or lead character of a film noir film will be bitter, sad, lonely, or depressed, because of bad things that happened to them. The person watching the movie has to decide if they think that a hero who does both good and bad things is a good person or not. The stories from film noir movies can make the audience think about how people should act, or how people should make choices in their life. This is one of the things that people like about watching film noir movies.