I’m officially diagnosed with Asperger’s syndrome, I usually just tell people I’m on the autism spectrum. I’m on the severe / low-functioning side for an Aspie (probably moderate instead of mild ASD), not at all what people usually think of when they think Asperger’s. Saying I’m autistic gives them a better idea and is not quite as likely to make them set their expectations of me so very high (which is a constant problem for me, I’m so often overestimated and then accused of just not trying hard enough or not caring when I can’t meet people’s expectations). Saying I’m on the autism spectrum doesn’t place me at the “high-functioning”/“mild” or “low-functioning”/“severe” end, neither of which fit me, so it’s my default.
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Yet in my new wildness and freedom I almost welcome the bitterness of alienage. For although nepenthe has calmed me, I know always that I am an outsider; a stranger in this century and among those who are still men.
-H. P. Lovecraft, "The Outsider"