A lot of versions of Buffy were shown to us during the 7th years run of the show.

Flashbacks, alternate universe, possessions or just evolution of that iconic character, which sides of her did you prefer ?
I made a list with pictures and the episodes in questions so you can remember better about it if you haven't seen the show in a while.

Epic fail Buffy (Episode 8 - Season 1)


Buffy Vamp (Episode 10 - Season 1)


Bitchy Buffy (Episode 1 - Season 2)



18th century Buffy (Episode 6 - Season 2)


Horny Buffy (Episode 18 - Season 2)


"Russian Roulette" Buffy (Episode 19 - Season 2)


Bimbo Buffy ( Episode 22 - Season 2)


Runaway/Emo Buffy (Episode 1 - Season 3)


Cold Hearted Buffy (Episode 9 - Season 3)



Helpless Buffy (Episode 12 - Season 3)


Prom Buffy (Episode 20 - Season 3)


Neanderthal Buffy (Episode 5 - Season 4)


Faith Buffy (Episode 16 - Season 4)


Uber Buffy (Episode 21 - Season 4)


"David Lynch" Buffy (Episode 22- Season 4)


Traumatized Buffy (Episode 16 - Season 5)


BuffyBot (Episode 18 & 22 - Season 5 and 1&2 Season 6)


Depressed Buffy (Most of season 6)



Singing Buffy (Episode 7 - Season 6)


Sex Addict Buffy (Episode 9, 12, 13 & 15 - Season 6)


Psycho Buffy (Episode 17 - Season 6)


"Commander in chief" Buffy (Episode 10, 11, 12, 13, 15, 16, 17, 18, 19, 21 & 22 - Season 7)



I've always liked Fail Buffy especially when she made those really unfunny jokes.
Cold Hearted Buffy was great . A subtle way to show us that she could have become just like faith (her nemesis) under different circumstances.
Uber Buffy and Psycho Buffy are timeless too. Sarah was impressive in both performances.