Anyone here familiar with the Aarne–Thompson–Uther Index (ATU Index for short)? In cases you're not familiar with it...it's a classification of fairy tales used to group similar stories from different cultures. For example, Cinderella is ATU 510A, Snow White is ATU 709, and Beauty and the Beast is ATU 425C. However, not all fairy tales can be classified according to the ATU. (Many literary fairy tales cannot be classified with the ATU.)
I first found out about it when I was first getting into fairy tales a decade ago, and it's taught me lots about the different fairy tales, as well as different variants of the same story. I consult the ATU Grouping category on Wikipedia so I can find stories, especially in the past two years since many fairy tale articles on Wikipedia list variants.
If you're familiar with the ATU Index...which ATU story types are your favorites?