Hybrids aren't at the top of my wish list as I'm more interested in just getting more 'pure' occult types (esp. werewolves and fairies). I wouldn't be opposed to them as an option though as it would open up more possibilities for gameplay and storytelling. So yeah, why not? We already have 'hybrids' now, but they are glitchy so it would be nice to see this fixed somehow. I would also love my vampire sims to be able to be witches too if magic turns out to be a trait and not a skill. Sea witches could work well too, vampire aliens, or werewolf ghosts perhaps... The more I think about it actually, the more fun it sounds! I would still like child sims with different occult parents to sometimes be one or the other as well though.