Anyway. Moving on!
Story: To Err is Human
Author: Lilac Summers
Word Count: 53,374
Author's Summary: Donna is the (un)lucky companion stuck with the Doctor in 1913 this time around; she's not quite sure how to deal with this sudden change in situation. Mostly she just blames the TARDIS. Uses season 3 episodes "Human Nature" and "Family of Blood."
Characters/Pairings: Tenth Doctor/Donna
Warnings: Insanely funny situations, some sex and great angst
Recced because: Who doesn't love a good HN-rewrite? And this is my absolute favorite ever, all categories. Not because it's Donna (even though that is lovely) but because it's brilliant on so many levels. It's so funny in places that you might wanna refrain from eating while reading (like when Donna steals ready-made food from the TARDIS because she can't cook.), seriously hot (John Smith, Donna, wall...) and at the same time, heart-wrenching (try reading the where John Smith begs for his life without tearing up!) and beautiful.
Lilac Summers is a fantastic writer, and even if you don't like D/D, you WILL like this because good writing is good writing, no matter the pairing, which Lilac Summers proves. She makes John Smith into his own man, not just the Doctor with lost memories and Donna is tossed between confusion, jealously, attraction, irritation and doubts, just as it should be.