This wiki may be interesting for anyone interested in the guts of the stories, including fanfic writers.
They've got pages about all the standard tropes, heroes, stock phrases, etc, with examples, and conversely, lists of the tropes etc used by most major TV/anime shows. Trying to avoid using these tropes in fanfic would not be a good idea, but being able to recognise which ones you're using and which ones are inherent in the show could be useful.
There's also a random plot generator, one trope from column A, one from column B, ... which actually produces more original plots than some TV shows.
They've got pages about all the standard tropes, heroes, stock phrases, etc, with examples, and conversely, lists of the tropes etc used by most major TV/anime shows. Trying to avoid using these tropes in fanfic would not be a good idea, but being able to recognise which ones you're using and which ones are inherent in the show could be useful.
There's also a random plot generator, one trope from column A, one from column B, ... which actually produces more original plots than some TV shows.