This was the movie that inspired Quentin Tarantino to make movies. Watching it as a little kid made him a cinephile for life.
At one point when they've escaped Dracula's castle, the vampire goes after Lou to bring him back with his powers of Mind Control. Lou actually holds out for a few moments before giving in and skipping merrily to his (intended) doom. Hey, it's not much, but how many people ever beat Dracula's powers of control, even temporarily?