Dear Yuletide Writer,
First of all thank you, kind person! Here are some suggestions that will hopefully help you.
Anne of Green Gables
I would love something where Anne, Gilbert and Diana go off and have an awesome adventure somewhere. Maybe New Brunswick?
Emily of New Moon
As a young teen I really identified with Emily, which might be why the Emily books are my favourite L.M.Montgomery books. Anything to do with the Murrays of New Moon or Dean Priest would be wonderful. Maybe write what it was like when they were kids? What was it like for them when Emily leaves to marry Teddy?
Analogue: A Hate Story/Hate Plus (Visual novel series)
Discovered this recently and very much enjoyed it, though it is the stuff of nightmares.
There are several things it might be fun to try. Simple fluff with Player Character and Hyun-ae (and Mute if you wish). Some things are left mysteries, it might be interesting to shed a light on them-for instance, was Ryu Jae-hwa murdered? You could also write an AU where Ryu Jae-hwa lives. You can delve into Hana's and Oh So-jin's lives as well! Poetry would be awesome if you are interested in doing so.
The Dovekeepers
Historical fiction has long been one of my favourite genres and when it is women-centric and long even better. I have always loved Egypt, so anything with the Yael in Egypt would be wonderful.
Kushiel's Legacy
Yes, given the series, porn is absolutely fine (fine for the others as well, fyi). Just...nothing that isn't already in the series. We hear about Allegra Stregazza educating woman, it would be interesting to see that in fic. Also, Phedre and Joscelin get up to things at various times during the Imriel book, it would be cool to see any adventure of theirs during the Imriel books (whether said adventure is implied in canon or not). Visiting places we haven't seen much would be awesome.
Oxford Time Travel Universe
Anything involving Kivrin and time-travel, to any place. She's a medievalist but if she gets sent to Ancient Egypt I wouldn't mind. Other possibilities: Byzantium, Jerusalem, Britain, France, Italy, and where she was supposed to go before she wound up smack-dab in the middle of the black plague. It can be as serious or as funny as you like-Kivrin could use a break given the events of Doomsday Book but maybe she already has had one.