I don't think there's anything wrong with sharing your interests with your kids, as long as you don't try to force them on them. I inherited much of my enthusiasm for science fiction, monster movies, comics, and so on from my dad, who exposed me early on to his own favorites: The Twilight Zone, The Outer Limits, The Creature from the Black Lagoon, The Shadow, War of the Worlds, etc. But it was never pushed on me against my will. "Hey, look, FRANKENSTEIN MEETS THE WOLF MAN is on TV tonight. You know all about the Wolf Man, right?" I never felt like my arm was being twisted. He made it fun. As with most social interactions, the trick is gauging the other person's interest. If they seem genuinely intrigued or curious, keep going. But if their eyes glaze over and they start looking bored, back off. I'm proud to say that I exposed my youngest sibling to Boris Karloff when he was only eight days old, and today his kids are all into zombies and werewolves.