Lots of people have suggested to me that I'm on the Autism spectrum. I have a hypothesis that the true cause of my vaguely Asperger's-like symptoms isn't neurological in my case, but comes from other contingent circumstances
My poor eyesight caused me to have glasses, which cause me to get visual data and feedback only from places near the center of my vision. This made me better at narrow-focus activities like reading, computer use, one on one social interaction, and strength training (because peripheral visual info wasn't good enough to be distracting) and worse at awareness-based activities like navigating larger social groups, or sports. A friend recently noted that when he switched from glasses to contacts, widening his effective field of vision, all of a sudden the outdoors became appealing. This seems like it's probably generalizable.
A narrow field of vision made direct eye contact more overwhelming than usual because a larger percentage of my effective visual field was dominated by someone's face than usual, so subjectively for me it was as if we were staring at each other from much closer.
This also meant I was basically never getting incidental social feedback through face or body language when my gaze was elsewhere.
Asymmetric hearing loss (almost no hearing in one ear, diminished hearing in the other) also contributed. It meant I would miss softer audial cues, again penalizing awareness-based activities more than narrow-focus ones. It also meant that I'd often want to turn my good ear towards people when conversing with them instead of looking at them, which meant I got even less feedback from their face, and accustomed me to paying attention to the words and not the expressions.
This may also be why I, like my mother, have persistent shoulder and lower neck tension more than anywhere else in the body: because we're always straining our necks, turning to hear and see things or lean in to listen.
I doubt that the whole story is true, but it's an interesting hypothesis to play with. It's certainly caused me to prioritize improving my vision and hearing correction equipment.