Interesting question. I don’t write fanfictions for two reasons. One, because I’m just not that much of a writer even though I enjoy it (also, english is not my first language, so I’m at a disadvantage!) And two, because describing things with words in vivid details makes me... “embarrassed”? Not to say it’s embarrassing to be a fanfiction writer, I don’t think that at all. But for me, it’s just a way of expression that I don’t like too much?
I love writing about situations between characters, ESPECIALLY interactions and relationships, but I prefer writing them in forms of comics. Less wording, only dialogs, and visual art to set the tone instead of descriptions.