Dramas are serious, plot-driven presentations, portraying realistic characters, settings, life situations, and stories involving intense character development and interaction. Usually, they are not focused on special-effects, comedy, or action, Dramatic films are probably the largest film genre, with many subsets. See also melodramas, epics (historical dramas), or romantic genres. Dramatic biographical films (or "biopics") are a major sub-genre, as are 'adult' films (with mature subject content).