Stealing Harry is, from what I can tell, an interesting AU where Lucius Malfoy went to Azkaban for killing Peter Pettigrew instead of Sirues. This results in Sirius and Remus running a bookshop to keep an eye on Harry from a distance, and eventually rescuing him from the Durslay's when he's eight.

Overall, it's well written and it doesn't look like anyone's particularly OOOC.

- Tomash

https://archiveofourown.org/works/537879

I like these threads but it's always hard to decide which ones to recommend since I have so many...

My Little Pony: Friendship is Magic
*The Pony POV-verse by AlexWarlorn
Links: http://alexwarlorn.deviantart.com/gallery/32745467 (read these first), http://alexwarlorn.deviantart.com/gallery/32848832
A terrific story that takes an in-depth look at the affect Discord had on the characters and what comes after. It's more of a psychological look at the effects Discording would have on a pony... and the aftermath is not always pleasant. But the story is well-written and engaging, and incorporates previous My Little Pony series in an interesting way.
* Marionettes by Kendell
Link: https://www.fanfiction.net/s/11594755/1/Marionettes
The story is a delightful skewering of the "Villain of the Week" trope with plenty of twists and turns. And it does incorporate canon... up to a point, anyway.

One Piece
*Marie D. Suesse and the Mystery New Pirate Age by Phalanx
Link: http://www.fanfiction.net/s/6328454/1/Marie-D-Suesse-And-The-Mystery-New-Pirate-Age
this is a fic about Mary Sues... all the while taking a deconstructive, and even deep, look into the concept. I can't recommend this one enough for people who like Mary Sue deconstructions.

Harry Potter
*Wish Carefully by Ten Toes
Link: https://www.fanfiction.net/s/4356667/1/Wish-Carefully
A delightfully cathartic read that points out the folly of the Death Eaters in a very satisfying way.

Crossovers
*Satellite Eyes by Geyhi
(Buffy the Vampire Slayer and Twilight)
Link: http://twispitefic.livejournal.com/21603.html
Why I like this one is obvious- Buffy shoots down all of Edward's attempts to be romantic in a very satisfying way.
*The Wedding Crashers by dasMervin
(Supernatural and Twilight)
Link: https://www.fanfiction.net/s/6721038/1/The-Wedding-Crashers
A gloriously cathartic read as the Winchester brothers (and Castiel) poke holes into the vampires' smug, self-aggrandizing ways.

And this is only a fraction of stories I like!

First off, a beautiful Johnlock figure skating AU: https://archiveofourown.org/works/14298093/chapters/32985759
It's incomplete as of now, but it's not on hiatus and the author has definite plans to finish it. It's just really, really beautiful, and also very accurate when it comes to skating (the footnotes are so helpful).

Next is a Supernatural RPF fic, so most of you probably won't be interested in reading it. For those who do like RPF, though, it's Jared/Jensen in a spy AU. And it's actually well-done and really adorable, I loved it.
https://archiveofourown.org/works/5553827

Sorry they're both on AO3. I know that's not what people tend to use around here, but I vastly prefer it to FF.net, so that's where I read fanfic.

As stated above, this is an original work, and even though you repeatedly said “fan works”, I wanted to share it with you. There’s yandere in there, so I would hesitate to call it realistic, but it’s pretty amusing/entertaining. It’s incomplete and on a hiatus, though.
So, with just this little delay, I give you; “My Perfect Classmate: Marilyn Susan” by Azule
https://www.quotev.com/story/6147874/My-Perfect-Classmate-Marilyn-Susan-Hiatus

It's called Antithesis, it is an AU of Harry Potter, but I believe it's well written.
Yes, it is a WBWL story, but it works well. It's an emotional story that makes you cry, rage and cheer on the characters. It also depicts the canon characters fairly well.
https://www.fanfiction.net/s/12021325/1/Antithesis

If you know Undertale, READ YOU CAN ONLY USE YOUR OWN. You can find it here: https://archiveofourown.org/series/369158

It's basically the best example I've ever found of how to write an AU well. (Spoilers and mental health stuff abound, though, so do heed the tags!)