I think people with autism have a more limited emotional palette, in that our emotions tend to run to extremes. We're passionate, we're furious, we're just more intense in general, even if it doesn't show on the surface, because our faces are not as expressive. A lifetime of constant anxiety, obsessive interests and frustrated interpersonal communication will do that to a person.
There are subtle gradations of NT emotion, however, that I just can't grasp. It goes along with the nonverbal social cues. I see it happening sometimes, but I just don't get it. Why greeting card holidays are such a big deal. Why it matters what other people think. What's so exhilarating about somebody else's good fortune. NTs have emotional reactions to all sorts of things that don't seem emotion-worthy to me.
OTOH, I have never known a neurotypical to burst into tears while watching a comedy, because they identified with some sad-sack character's public humiliation, or get furiously angry over a tiny noise no one else in the room could hear.
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"I don't mean to sound bitter, cynical or cruel - but I am, so that's how it comes out." - Bill Hicks