Interesting question (and Hi... new to WrongPlanet dot net - not new to this wrong planet).
I thought there were several common Aspie traits, though exhibited in varying degrees (but as a recently diagnosed Aspie am interested to know if true). Here are the traits I understood to be common (all line up for me anyway):
1. Dependent on routine (After being diagnosed this was a big Aha for me... notice that if my current routine gets derailed, it causes anxiety for me. Ex: getting home after work, I let my dogs out, feed them and the cats, sit down at the computer to chill out, smoke a cig, change clothes. IF something derails that, like having to get back in the car to get milk, Ojida).
2. Special interests (whatever the current obsession(s) down to the gnats ass detail, gather info and process, highly focused)
3. Clinical ego centricity (though I think this has to do with social clues part, and perhaps empathy challenges, I could see how it would be seen as ego centricity. I have noticed though, since being diagnosed, that in conversation and writing it often seems to come back to me, e.g., here's what I think, I don't see it that way, etc.)
3a. Impaired ability to read social clues (stuff that seems like secret code, not direct, as if I'm supposed to know that the eye blink meant that what I'd just said upset that person, even if it what was said was true).
3b. Empathy challenges (Until diagnosed I wasn't even sure what empathy was, confused it with compassion which I have loads of. Connected the 3's because I'm supposing they are part of the same trait, systemic, no real way to change an NT perception of these without becoming what appears to be semi-functional at each. Seems like they would play off each other, e.g., if I can't read social clues how can I be seen as having empathy? if I'm not empathic, how am I not ego-centric? IF I have to ask directly because I didn't understand and it is socially "unacceptable" then I can't read the clue... LOL)
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Aspie score: 157 of 200
NT score: 45 of 200
AQ score: 43
EQ score: 10