My family was always a little dark, but in a weird way. My grandfather was an optometrist, and once put a cut out pair of eyes into a rectangular window, that peered into the meeting room at his office. He told me "no matter where you go in this room, those eyes will see you." I was only 6 but thought it was cool. When we drove, one of his favorite jokes were "how many people are dead in that graveyard?" You try to count and he says "All of them" haha. Me and my brother would also play hide and seek at graveyards now that I think of it.
Lastly, my mother read me all the usual stories like mother goose, but would also read from the book Mysteries of the Unexplained or Scary Stories to Tell in the Dark