Since two people guessed right (and I owe them fic now!) I'll do these in the same order.
BRONZE TIER
Fics 1 and 2: Only fics in their fandom. I wrote both. If you follow me on tumblr you probably know what the canon is.
Commander of the VanguardSengoku Basara
Mitsunari is more valuable to the Toyotomi army than he knows.
Engaged in His EmploymentSengoku Basara
Toyotomi Hideyoshi has burned all affection, all attachment, all weakness from his life. He has no friends, only allies and subordinates. He has no family. He takes no women or boys to bed. He killed his wife to prove his strength.
He has not killed Hanbei.a
SILVER TIER
Fics 3 and 4: Also in the same fandom, with some character overlap. Also somewhat predictable given my recent fannish history.
A House of Dust and DarknessFate/Zero (and Fate/Stay Night)
After his brush with the Grail, Gilgamesh adjusts to life in the basement of the Fuyuki Church. The priest is not as accommodating as the King of Heroes deserves.
If Thy Hand Offend TheeFate/Zero (and Fate/Stay Night)
“Father,” the boy asks, “am I bad?”
“No,” Risei answers without missing a beat, and holds Kirei in his arms, pillow and all. “Never. You did something bad, but bad isn’t something you are. You’re beautiful and good and God loves you, and so do I.”
GOLD TIER
Fic 5: Not a fandom I have written in before, but one I have written about more than once. Nevertheless, the subject matter is something you would expect from me, if somewhat parodic.
Equus malusDr. Horrible's Sing-Along Blog
He rides across the nation, the Thoroughbred of Sin.
He fights for subjugation, and of course he'll win.
(Of course.)
PLATINUM TIER
Fic 6: A fandom I have neither written in nor talked about before, and frankly one I don't think most people would immediately associate me with. But the canon is part of, well, the canon, of its source medium, by a creator universally respected, and deals with cultural themes and mythology that I'm really interested in.
The Age of Not-BelievingSpirited Away
Ten years after the bathhouse, Chihiro spends Golden Week vacationing with her real-world friends, but can't help keeping an eye out for some from the other side.