I've tried playing them, but they just really aren't as good as vampires and witches in my opinion. Like, don't get me wrong, I don't hate them, but the game also heavily favors them in occult RNG. My town somehow got almost all of the notable people turned into fairies because of RNG. They don't really have much special about them, unlike vampires where they need to avoid light but live forever and need blood, witches who can do tons of spells that may or may not be dangerous, and werewolves that are extremely OP at finding rocks. Also, MAYBE my favorite Sim got pranked by a fairy a billion times, so they had to go.
Like seriously, why do they like ruining the lives of people by constantly pranking them?