Oh, nothing special. One of the reasons I thought we have nothing in common with Rainman...
Seriously, once I excelled in basic physics at the end of my first year in high school, I was 7th on the national competition, and among top 20 in math (only the first place was ranked). I can visualize some of the basic rules of physics directly in my mind, like gravity for example. I don't think all of this is really that unique.
The other stuff I developed is the ability to hear nuance differences of audio reproduction quality. I have some basic understanding about the connection between the sound and the layout of the equipment, but again, I'm far from being damn good at it, I'm sure John-Elder Robinson was better at this.
I have been pondering about the third recently. It seems I don't think within clear boundaries such as in pictures, patterns, concepts, words etc. Most likely I use several of them without priority. It allows me to "peep out" of my little world and have some understanding of seemingly totally different ideas.
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Another non-English speaking - DX'd at age 38
"Aut viam inveniam aut faciam." (Hannibal) - Latin for "I'll either find a way or make one."