I also recommend Tumblr. While it's not strictly a fanfiction - only platform, there are many users who post their Attack on Titan fanfiction there. Plus, Tumblr often has a very active community discussing and sharing their thoughts on these fan - made stories, which can enhance your overall experience of reading or 'watching' (if it's in a more visual story format) the fanfiction.
One good example could be a fanfiction where the Female Titan has an unexpected alliance with the main characters. In this story, she might reveal a hidden side of her nature that was not explored in the original series, like having a moral code that goes against her initial actions as an enemy. This can add a whole new layer of complexity to the character.
One popular 'Attack on Titan' fanfiction to watch could be those that explore alternate endings. For example, some might imagine a world where Eren's actions had different consequences. Another interesting type could be the ones that focus on the backstories of minor characters, like Sasha's life before joining the Survey Corps. And there are also fanfictions that create crossovers with other popular series, which can be really exciting to watch.
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 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.