Great list Craig. Here's a couple of my choices.
Western: Tombstone, Unforgiven, Outlaw Josey Wales, Dances with Wolves, The Good The Bad and The Ugly.
War: Full Metal Jacket, Saving Private Ryan, Apocaylpse Now, Platoon, The Dirty Dozen
Music: Purple Rain, U2; Live from Boston, Peter Gabriel; Secret World, Korn;Live on the Other Oide, NIN;Beside You in Time
Family: Finding Nemo, The Lion King, Madagascar 2, Ice Age, Wall E.
Cops and Bad Guys: Scarface, Running Scared, Se7en, Goodfellas, Training Day.
Comic Book: The Dark Knight, Superman, 300, Batman Begins, Spiderman 2.
Sci-Fi: Aliens, Blade Runner, T2, The Fifth Element, The Matrix.
Adventure: The Pirates of the Caribbean, Titanic, Apocalypto, Master and Commander, Pan's Labyrinth
Comedy: The Blues Brothers, Dumb and Dumber, Trains Planes and Automobiles, Caddyshack, Liar liar.
Drama: Crash, Million Dollar Baby, Bugsy, Jerry MacGuire, V for Vendetta.
Director: James Cameron, Ridley Scott, Martin Scorcese, Steven Spielberg, Clint Eastwood.
I may have misplaced movies into proper genre,if so, sorry Craig.