I am aware that I fail 'shipping forever, because I don't have a good answer for this. I am entirely on the Willow/Spike train however, which is odd because Spike/Dru is my Buffy OTP and I <3 both Willow/Oz and Willow/Tara.
(And no, Giles and Ethan don't count because they're non-canonical in the same way Xavier and Magneto are. Barely.)
Day 1:
Favorite SeasonDay 2:
Favorite EpisodeDay 3:
Favorite Song Used In An EpisodeDay 4:
Favourite Female CharacterDay 5:
Least Favourite Female CharacterDay 6:
Favourite Male CharacterDay 7:
Least Favourite Male CharacterDay 8:
Favourite FriendshipDay 9:
Favourite RomanceDay 10:
Least Favourite SeasonDay 11:
Least Favourite RomanceDay 12:
Least Favourite EpisodeDay 13:
Favourite Potential SlayerDay 14:
Favourite Female VillainDay 15:
Favourite Male VillainDay 16:
Episode You Like That Everyone Else HatesDay 17:
Character You Relate To The MostDay 18:
Character Who Didn’t Get Enough Screen TimeDay 19:
Character You Like That Everyone Else HatesDay 20:
Favourite Spike-Centric EpisodeDay 21:
Favourite Willow-Centric EpisodeDay 22:
Favourite Xander-Centric Episode Day 24: Favorite Example of 90s Special Effects
Day 25: Favorite Buffyverse Saying
Day 26: Favorite Scooby Moment
Day 27: Cutest Moment
Day 28: Character You Love To Hate
Day 29: Episode You Hate That Everyone Else Loves
Day 30: What You Think Made Buffy So Great