Animation- Princess Mononoke
Comedy- Life of Brian
Superhero- The Dark Knight (Watchmen and X2 are up there though)
Gangster- Goodfellas
Documentary- Wonders of the Solar System (Not really a film but it's cool)
Fantasy- Lord of the Rings Triology
Horror/Thriller- The Ring (Japanese version)
Science Fiction: The Matrix
Sports: Mean Machine (Vinnie Jones is a living legend)
War: Saving Private Ryan
Don't really watch these genres so I have no clue:
Western
Musical-
Romance-