I don't in theory mind the word aspie, but in practice it often bothers me because of problems with universality. "Aspie" doesn't refer to all kinds of autistic people, yet all kinds of autistic people, in casual conversation, will get called "aspies," therefore sort of erasing the presence of those of us who aren't classified under Asperger's and convincing casual observers that all auties online fall officially under the aspie classification. Which is why I tend to use autie instead, it's a broader term that includes but is not limited to those who are described officially as aspies. (Plus I differentiate less between the categories than most people do.)
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams