1. When Dracula (1979) with Frank Langella was being promoted heavily, I was only a little kid. It was enough to prompt a nasty nightmare about being pursued by Dracula.
Interestingly, there was a magazine photoshoot inspired by the Dracula craze in which a man dressed as Dracula bit the necks of two naked women. I saw this in one of my Uncle's girly magazines. To this day, I wish I knew what magazine that was. He threw out his entire girly magazine collection when he married my Aunt, including an entire run of Australian Playboy from the very beginning. I was not impressed when I learned of this. No woman is worth giving up your girly mag collection (unless you're a pathological porn addict).
Funnily enough, in later years I came to love vampire movies, and have dozens of vampire novels and movies in my collection. So like Gabriel Knight and The Wall, I overcame my childhood fear, too.
2. The face hugger scene from Aliens with the multitude of eggs erupting was enough to give me a nightmare as a teenager. Not cool.
3. The last movie-inspired nightmare I had was only a few years ago. It came after watching the trailer for an old Italian horror movie that someone here suggested might be the answer to a movie ID question I posted. The Beyond (1981). Giant live spiders on face = NOOOOOOOOOOOO. Incidentally, it turned out that the movie I was trying to ID was the awesome independent movie Equinox.