Drama films portray realistic characters and conflicts in serious stories that move audiences emotionally. They focus on developing characters audiences can engage with by showing characters' journeys and struggles with issues like social problems. Common conventions include portraying real characters, settings, and stories through dramatic sounds and performances. However, some films break conventions by subverting audience expectations of predictable plots, like the drama film A Serious Man which confuses viewers, or Titanic which ends tragically rather than happily.