Our kids sound very similar. My son also picks at/bites nails (I also bite my nails). I have also noticed that my son is ignoring projects he would have really enjoyed (like making a bug model in his class) because it cuts into his daydreaming time. He was also sensory seeking but had a lot of OT as a baby and doesn't seem to have a lot of sensory stuff anymore. Do a google search on MD and see if it fits your experience growing up. I do remember daydreaming a lot to survive boredom, but no one I know of in my family did this, but they could have just never mentioned it or learned to hide it. I do feel like I have addictive behaviors, for instance I will use "flow" to solve problems whenever I have down time... I will do all that is required, but once I have down time I'm back to researching...it is hard for me to just sit and be in the moment.
