Not an author, just signed up to be able to give encouragement to writers.

List of favorite Buffy fics (not neccesarily hosted here):


Carrie - Take your time, It's about time
Kimberley Rector, Martha Wilson - When Hellmouths Collide
Nomad - Donna the Vampire Slayer
Don Samples - Misunderstandings series (trilogy so far)
mkcrl120 - What The Hell(mouth) Happened ? (Fanfiction.net)
mkcrl120 - Explaining Africa; Souls, Slayers and a Scythe?
lyapunov - Some You Lose
honorh - Ships that Pass Into Type (short but very funny caricature of shipping and slash; last seen on ff.net; old fic, seems follow ups are lost)
Laney - Fragile Balance (other stories)

This list is short and incomplete.