Depending on the source, I've read that people with any sort of ASD tend to be either super imaginative or have a complete lack of imagination. I have a complete lack of it and this frustrates me a lot. For example, in school we'd have creative writing assignments and stuff like that, I'd spend the entire class period sitting there blankly not having a clue what to write about whilst everyone else was busy writing. Not even because 'I could write X but it sounds stupid', but I would not have a single idea in my head that I could use.. Sometimes I've ended up reading what other people wrote about and it usually tended to be
good and
interesting. And I've always
wanted really badly to be able to write stories. I just don't have a clue how to. I am aware of websites with 'writing prompts' but I find them useless. They give a sentence, and that's all fine, but then I just look at them and think 'ok, that happens, and then what next?'

When I was in high school, any time I had a writing assignment I would write about motorcycles regardless of the assigned topic.
In junior high we had our first research paper. Mine was titled "Common Diseases of the Horse's Hoof" -- the only paper I remember writing in school that wasn't about motorcycles.