My son is only 3 1/2 and I already see he looks more immature and marches to the beat of a different drummer! He dances to classical music, loves to watch people bellydance, sings loud songs and is very clear about what he wants and doesn't want -- which doesn't have anything to do with what anyone else wants usually
He's the only kid I know who, when everyone says "you put your left foot in" and all those instructional dances, never does what they say -- since he was of walking age. He is definitely not swayed by the crowd.
Ds always tries to negotiate too, and it makes it hard for him to take lessons from anybody. We're trying swimming lessons for the first time now, and it's funny watching the young lady chase him around the pool and dealing with how strong-willed he is. But I do worry about him.