Chris1234, very interesting. My DS(5) is doing the same "hug" technique. It never really occur to me, that it could be part of his gifted intensity.
My DS if he is happy, he is really happy. If he is sad, it seems like the world is crumbling down in pieces. If he is interested in something new, the whole surrounding knows about it and everybody has to be living, breathing his current interest or discovery.
When he was about 4, there was a period for couple of months that he did not wanted to go anywhere out of our house. Not even his favorite places (like science museum),visit at grandma's house, or going out to a restaurant. It was scary for me. But it sorted its self out without any outside help.
At times DS has bad dreams about how people are throwing out things into garbage, that can be recycled, how the garbage hills are growing.
We never really had an issue with aggressive behavior other than resulting from wanting to touch more other kids or hug them.
But we are living with "intense intensity" every day. I take it as a part of the package deal. It worried me for awhile, but the more I read about gifted children, the more I know, that it is just the way their brain is working.