well like i know if ur a hardcore buffy fan u really cant pick a one fav episode of all time but here some categories for episode

Fav season ending:
fav season opening:
fav episode about buffy:
fav episode about ur fav character:
worst episode:
the most classic buffy ep:

and if u can think of any other categorie just add it in


Fav season finale:season five the gift
fav season opening: season 1
fav episode about buffy: the gift
fav episode about ur fav character:willow season 6 finale and season 7 finale when she turns into a goddess
worst episode:i dont have one i can think of
the most classic buffy ep: season 1 finale