I decided X=Retellings
Tam Lin Retellings (I know it's a ballad but it's old and there are faeries. I count it)
12 Dancing Princesses and Frog Prince (a two for one!):
My favorite fairy tales are "Beauty and the Beast" and "East of the Sun, West of the Moon", both of which derive from the myth of Cupid (Eros) and Psyche. Consequently, I judge retellings of these much harder than any others. Here are my favorite retellings of all three:
What are some of your favorite retellings?