From 93 Filmation She-Ra episodes (1985-1987), the ones that adult fans of the series rank highest in retrospective discussion. (1) The Secret of the Sword TV-cut - the 1985 theatrical film. (2) Reunions - the first Eternia/Etheria crossover. (3) She-Ra Unchained - Adora without her powers. (4) Glimmer’s Story - the canonical Glimmer/Bright Moon origin. (5) The Mind of Shadow Weaver - first Light Spinner hint. (6) Gift of the Magicats - Catra’s origin. (7) The Eternia Affair - Adora reunited with her family. (8) Flowers for Hordak - Paul Dini’s morality piece. (9) Shades of Orko - Etheria crossover with Trolla. (10) When Whispering Woods Last Stood - Rebellion-mythology lore.
Catalogue source: heman.fandom.com (CC BY-SA 3.0) and contemporary industry coverage.