I like mostly realistic, with some fantasy elements. I don't mind Grim, aliens, ghosts, or vampires and I love witches and werewolves, but I like the fantasy element to make sense to my gameplay. Grim... yeah, someone dies, grim comes, they turn into a ghost. I don't like vampires invading my games. I like them only when I want to play that element. Aliens, they are pretty tame, so they don't bother me. A chance abduction every now and then with a rare chance of impregnation is fine for my game. I won't have any problems with witches, provided they are done well and not all green skinned and pointy nosed, I'll have no problems them being in my games.