For me it has to be the Universal Horror classics. From Dracula (1931), Frankenstein (1931), The Mummy (1932), The Invisible Man (1933) The Wolf Man (1941) and all the related sequels. I grew up watching these movies with my Dad as a kid Friday nights on "Creature Features" from the mid 70s to the early 80s. They showed these classics as well as the 50s SciFi films and other stuff like the Godzilla films. I can still vividly recall staying up late, since it wasn't a school night, on the living room floor with a pillow and blanket and all the lights turned off watching the black and white monster classics with a giant bowl of popcorn. They usually showed 2 movies and ended around 2 am. Sometimes I would wake up Saturday morning still in the living room. As a little kid I used to look forward to "Creature Features" every weekend. Still love these movies.