"Not in the Brochure" by beer_good_foamy Full disclosure: This fic began life from an off-the-cuff prompt by rebcake on my journal so, yes, I am biased. It's still as funny as hell, though. The "flaming handfasting" in Chosen goes just a bit differently than in canon, and Spike proves he's a mama's boy to the end - Buffy's mama, that is.
"Spirits in the Woods" by hourofthewolf (a collaboration between wolffan200 and 3hours) Long-form (multichapter) fics on the internet rarely hold my attention. (This is more the fault of my attention span than the author. Sometimes.) This one held my attention - Spike returns to SunnyD between seasons 3 & 4; AU but captures the humor and adventure at the heart of the Buffyverse, and the characterizations with spot-on canon characterizations that remain faithful to canon rather than twisting or distorting the characters to suit the authors' desires.
"Night Games" by spuffy_luvr Something different in the post-series/NFA Spuffy reunion sub-genre: funny, sexy and playful. Buffy and Spike play a game that doesn't involve a deck of cards or Monopoly figures: "Learn how to use one of these, asshole."
"Live (Where You Are)" by snogged Wishverse!Buffy/Willow. Willow opens up her world to the weary, hardened Slayer who begins to find her heart again. Not as sentimental as I'm making it out to be - in fact, not sentimental at all, but entirely charming. Why have I never seen this pairing before? I could live in this version of the 'verse, very happily, if Snogged would let me.
"Stone" by valyssia. Perhaps the most power and pain I've ever seen packed in 100 words. Buffy, Spike, a "deleted" scene from S6 that's barely longer than two or three camera shots and should have been in the series. This story is part of my headcanon now.
(FYI : No gratis was received prior to the making of this post. Honest. Not even a single cookie.)