I am concerned that WHEN we get fairies, we will be deprived of toddlers with fairy wings as every other occult in the game starts as a teen. One of my very favorite parts of fairies in the Sims 3 was watching the fairy toddler flap his or her little wings, raise a foot or two off the ground and then fall back to Earth on their bum with a giggle. I truly hope they include this again.
And incidentally, I love all of the suggestions throughout this thread. If even a fraction of these ideas is used they will be a great addition to the fairy lore.