Goodnight, Moon by yahtzee63, snitched from boniblithe's LJ rec, Joan of Arcadia. I swear, I almost skipped by it, so totally not my fandom, and then I went ahead and opened and just. Amazing. I think it broke my heart. In a marvelous way.
Best fic I've read this year. Maybe longer than that.
On a much, much, much lighter note, josselin tackles Brian facing his inner girl in For Old Time's Sake, and man, the funny!
Trust me, after the first one, you'll want it.