I voted the following:
Action,
Terminator, Rambo, True Lies; nigh all from the '80s and '90s.
Crime,
GoodFellas, Donnie Brasco, American Gangster, etc.
Drama,
Penny Serenade, etc
Horror,
Dawn of the Dead, The Faculty, Friday the 13th (1980), Silence of the Lambs, etc.
Musical,
Phantom of the Opera, Sweeney Todd, etc
Mystery,
Inception, Memento, Disturbia, Fight Club, etc.
Romance,
American Beauty, Indecent Proposal, etc.
Science Fiction,
Star Wars, The Thing, Aliens, etc.
Suspense,
Fatal Attraction, Charade, etc.
Thriller
Die Hard, Edge of Darkness, Sixth Sense, etc.
War
Saving Private Ryan, Platoon, etc.
Of course, there are many, many more. I have seen so many that I can't think of all of them.
I like, and watch, all genres; however, the ones listed are my favorites. My least favorite is adventure.