besides westerns I love the following:
Shaw Brothers Kung fu
British Horror - Hammer and Amicus (I love the Amicus anthology movies a lot).
Horror based on HP Lovecraft
Movies based on comic books (Hellboy, Watchmen, The Spirit)
Nature Run Amok movies
John Carpenter, Guillermo Del Toro, George Romero, Mario Bava, and Quentin Tarantino movies