He sems as a.............. child. Look, children are annoying at times, but most of them grow up out of it (but then... there are still annoying adults).

And let him be excited about life, because life will soon enough "cure" him out of that. Maybe we should learn from children about being excited about mundane things. It has been proven children laugh many times more than adults.

as for agression.... it depends. It could be that he is a boy and boys be boys.

If it is not causing ubersignificant distress, try not to get him involved with the system (unless you know a good child psychologist who will not slap a fad label on him, instead of working with him).