@Porcuine20 I agree with that. The sociability aspcet is the main one in my experience (and I must emphasise I am aware it is JUST my experience)!
I have a business partner with ASD. He comes across very harsh in emails for one example, has upset quite a few friends and colleagues. It doesn't upset me, as I just know what he is like but I can 100% see why it could. He addresses me in emails in a sense that was my boss to do it, she'd be taken for disciplinary. But he doesn't know he's doing it and doesn't mean to.
He cannot socialise unless he's drunk (I mean, I go out for a few drinks with him sometimes and he will actually get drunk BEFORE we go out, meaning by the time I am nicely tipsy he's absolutely sozzled) which has resulted in a lot of 'babysitting' on my part which I have sometimes been resentful over as I can't enjoy my night for looking after him. I avoid it now and go out with people who can drink sensibly! He was like this at a significant birthday of mine and really annoyed a lot of people and completely took any attention off me as people were having to hold him up, avoid putting drinks near them in case he knocked them over, he even fell asleep in the middle of an act I'd booked. can you tell I'm still bitter about that one.
His partner is often upset as he doesn't know how to make her feel loved or appreciated.
I dated someone with ASD quite recently. She came across as very selfish, although I am not saying it had intent. It was an obvious (albeit not visible) disability. No idea how to talk to people, what was seen as rude, that it was selfish to not call me when I was waiting for it, that it isn't okay to do XYZ to your partner. No idea.
I have a neighbour who has ASD, he was my lodger for a while and I had to ask him to leave. Has never had a partner, lived at home until he was in his early thirties, doesn't go out anywhere or do anything just lives a very simple life. Harmless perhaps you'd say but he is also sexist and extremely judgmental, and was an absolute nightmare to live with for various reasons.
I am not saying that allistic people can't be rude, odd or unsociable of course. I am saying that the difference between ADHD and ASD is down to social interaction at least a lot of the time. I am currently in the process of being diagnosed with ADHD and know several people with it. Their 'issues' if you will do not seem to affect others in the same way ASD can be hurtful and upsetting to others. There is a reason there's a thread on here for 'married to someone with ASD' and not one for 'married to someone with ADHD'.