I taught myself to read at 3
I watched TV upside down or through a mirror
I had an imaginary friend
I was classed as gifted at school
I used to write down the make, model and colour of every car that passed my bedroom window for hours
I used to read the phone book and the yellow pages
I had to leave the room if I was warm or it was noisy
I used to cry rather than laugh
I hated having friends round
I used to take electronics apart and put them back together
I would go mute if grown ups I didn't know spoke to me
There will be lots more I expect. I will add them when I think of them.