AO3 is my top recommendation. It has a very user - friendly interface and a great tagging system which makes it easy to find 'their story' fanfiction. It also allows for a wide range of content, from fluff to angst. Another option could be Tumblr. Although it's more of a social media platform, there are many fanfiction writers who post their works there. And of course, there are some smaller, more niche - specific forums dedicated to certain aspects of 'their story' where you can also find fanfiction.
One popular website could be Archive of Our Own (AO3). It has a large collection of fanfictions including those related to 'The Office'. Another option might be FanFiction.net, which has been around for a long time and has a wide variety of fan - created stories.
Fanfiction.net is a popular website. It has a large collection of Naruto fanfictions, including ones related to Tsume. You can search by character name and filter out the ones that don't interest you.
Fanfiction.net also has a decent amount of FMA fanfiction. There, you can find various works by different authors. However, the interface might not be as modern as AO3, but it still offers a wide range of stories.
FanFiction.net also has Noragami fanfictions. It's been around for a long time and has a wide range of works. Some of the stories might be a bit older but still very interesting. You can search by genre or character to find what you like.
DeviantArt sometimes features Nightwing fanfiction among its art - related content. Some artists not only post their drawings but also write short stories or fanfics about the character. It might not be as focused on fanfiction as AO3 or FanFiction.net, but it's still worth checking out for some unique takes on Nightwing.
Some popular websites for fanfiction in general, which might also have MLB fanfiction, are Archive of Our Own (AO3). It has a large collection of fan - created works across various fandoms, including MLB. Another option could be FanFiction.net, which has been around for a long time and has a substantial amount of fan - written content related to different topics, and you may find MLB fanfiction there as well.
DeviantArt is not only about art but also has a section for fanfiction. For Moana fanfiction on DeviantArt, you might find some really creative and unique takes. The community there is quite diverse, and some of the fanfictions might be accompanied by beautiful illustrations related to the story, which can enhance your reading experience.
FanFiction.net is also popular. It has been around for a long time and has a large number of Aquaman fanfictions. You can search by different criteria such as the rating of the story, the length, or the specific plot elements you are interested in.
Well, Tumblr can be a source too. A lot of fans post their fanfiction snippets or links to longer works there. Additionally, some dedicated Star Wars fan forums might have sections for The Mandalorian fanfiction, but they might require some searching around.
Archive of Our Own (AO3) is a great place. It has a vast collection of Supernatural fanfiction. You can find various genres and styles there. Fanfiction.net is also popular. It has been around for a long time and has a large number of Supernatural stories.