Some of my favorite AU stories from the past year, arranged from shortest to longest.
No Take-Backs (Buffy/Faith, PG-13) by
brutti_ma_buoni. Dark AU, in which Scooby gang loses and the Mayor ascends and is now ruling Sunnydale as a big snake.
Never a Good Time (Cordelia/Darla, PG-13) by
aaronlisa. AU, where it was not Angelus, but Darla, who got cursed with a soul.
Canaries in a Coalmine (Dawn, Faith, PG-13) by
beer-good-foamy. You can trust Beer Good to come up with a creative apocalypse even in a fictional universe where apocalypses happen on a weekly basis.
In this dark-ish AU it's global pandemic of amnesia, and Dawn and Faith travelling towards the last hope for a cure.
Casablanca (Buffy/Spike, PG-13) by Glassdarkly (aka
shapinglight). Some years after the events of "Chosen" Buffy and Spike meet in a bar, and... Well, let's just say, it's not your usual spuffy reunion story.
I Wish (Tara/Willow, PG-13; ~43 000 words) by BiJane. What if Willow accepted D'Hoffryn's offer in "Something Blue"? Here how it goes - the story of a shy witch named Tara Maclay, and a vengeance demon named Willow Rosenberg.