Fandom Category: Hunger Games
Pairing: Katniss Everdeen/Peeta Mellark, Joanna/Haymitch
Fic Title: Hope in the Darkness that I will see the Light
Rating/Warning(s): Rated M. Author warned for Graphic Depictions Of Violence, Major Character Death, Rape/Non-Con
Genre: AU, Drama
Why This Must Be Read: While still gritty, it's more hopeful than the original. A very believable pairing, goes on forever, and there's more in the universe.
Fandom Category: Batman Beyond
Pairing: Terry McGinnis/Dana Tan
Fic Title: Through a Dark Mirror
Rating/Warning(s): rated T, author gave no warnings but there is canon character death and violence appropriate for the original canon.
Why This Must Be Read: This is one of the first stories that truly sold me on Terry/Dana, who suffered from inconsistent writing in the last two seasons of the show. The writer tied the entire canon together in an interesting way while making the characters seem strong and real, even though they're flawed.
This is actually a shared account, so throughout we'll be each choosing our answer.