The Fantasy Kitchen Sink is a trope name that refers to a setting in which there are multiple types of fictional beings living together in the same story. Currently, I am stuck between two ideas in which one involves a fantasy kitchen sink so to speak (werewolves are the main characters but there are also witches, vampires, faeries, etc.) and another idea in which there are just witches and werewolves. Though I like both ideas, I cannot choose between the two. I know it depends on how you write the story to make something like this work, but I would like some opinions on the two setting premises. What do you like and dislike in stories that feature only one or two preternatural creatures? What do you like and dislike in stories that have every fantasy creature you can name?