God am I boring! I'm not diagnosed with anything (yet)! I was an inveterate fidgeter (no innuendos please, I've already thought of them and they aren't funny) until I took up guitar. I used to pick things up, wonder off with them and loose them. I don't know if it's just me getting older or if guitar killed that habit.
I used to find school very boring too.. my primary school teacher got in an educational psychologist to assess me and his findings were opposite to expected, I was just too bored to think. I guess I was just precocious, 'cause I don't feel very bright now!
At secondary school I found English lessons particularly boring and pissed around so badly my teacher had to send me to a nother teacher to be bollocked. She had a brilliantly patronising way of bollocking me, she was a highly intelligent woman who made me feel the size of a pencil-rubber. I was bloody impressed to tell the truth! I remember that once my friend Neil locked my teacher out of his lesson.. the headmaster was walking past and, pretending that he didn't have major problems with class control he acted all nonchalant apparently. I missed the affair because I'd already been sent to the deputy head's office!