There are many classic movies worth watching again and again. Here are some movies by category and theme for reference: 1 Science fiction movie: - Star Wars - Blade Runner - The Matrix Series - Inception - Interstellar Crossing 2 Gangster movies: - The Godfather Series - Infernal Affairs - Crouching Tiger, Hidden Dragon - Let the Bullets Fly - The Colors of Heroes 3 Brain-burning Movies: - Fatal Magic - Inception - Memento - Mulholland Drive - The Butterfly Effect 4 Horror Movies: - Alien - The Grudge series - Dead Silence - The Ring - Evocation 5 adult movies: - Violent Street Series - Pulp Fictions - [Total Memory] - "Spring night is short, young lady, let's go forward." The above was only a small part of it, and they could choose to watch it according to their own preferences and needs.