Intimidating? I still hear that one once in a while. People tend to see me as being about a foot taller and made of stone rather than flesh. Comes in handy sometimes. Other times I've learned to slouch some, limit gestures and fiddling with things like twirling pencils or rulers, interjecting yawns and smiles, adjusting eye contact to a momentary thing when first speaking, then drifting it off to the side into a "distracted stare".
Now I am just aloof, apathetic, and distracted
You just can't win this battle, there is more than just a signal difference but a whole world view difference at play. The NT can't imagine how you could possibly not get it, and you can't possibly imagine what you're not getting. Things that are simple to you require a long convoluted alien emotional logic for them, and things that are emotionally intuitive to them require a long convoluted alien mental logic for you.
The real kicker is we need the clear communication in words and ideas, they summarize it in emotional facial, body, and tonal cues and the words only make up a fraction of the content they put out, but we take the words at face value. We also give our words at face value, and they just can't seem to take them that way.
Good luck. I was once written up by an employer for my "threatening demeanor" that "intimidated others". Basically I was just bored and fiddling with office supplies with a level of concentration beyond that of the norm, and looking up at each new speaker when they began speaking with expectation of perhaps hearing something interesting.
The bottom line is there are more of them than there are us, and they will ALWAYS put ANY communication difficulties or misinterpretations back on us because of it. They can't read us any more than we can read them, and being the majority they usually can't be bothered to make the effort, and since we don't "act natural" to their frame, many have a fear or anger reaction in the places we would have puzzled reactions.