@Newgirls
I’m interested in why boys are not taken to dance classes in the same numbers as girls when they have so much supposed energy? Yet clearly boys can be incredible dancers? That is parental or societal decision? Even in a modern society we are still steering them in certain directions.
My ds did ballet for a few years.
He didn't mind it, but wasn't enthusiastic in the way my girls had been.
But in the lessons he was very different to the girls.
Teacher:
Let's flap our wings and flutter round the room pretend you're flying.
Girls: raise their arms gently, flap them and on tiptoes run gently round the room, all in the same direction (so effectively in a circle)
DS: Puts head down and arms straight out at the side. Makes zooming plane noises and runs round the room in the opposite direction to all of the others.
If they asked what animal they were, then the girls would be butterflies, he'd be a stag beetle. 
Luckily for him teachers and parents alike thought this was funny. He was doing the instructions but in quite a different way.
He stopped when he got to about 6yo. I'd have quite liked him to carry on, and it was definitely his decision.
He loved tap (or "noisy dancing" as he called it) for a few more years, but now would say he prefers jazz, which he does in musical theatre.
I've 2 girls, 1 boy. There are differences between my girls, and similarities between my boy and each one of my girls (esp the eldest).
But there are things that are very stereotypical.
The girls are older, and ds had multiple illnesses as a baby and toddler and very little socialising outside his sisters until he was 3.5yo when he went to preschool-where his best friends were girls.
He liked the dolls' buggies. He occasionally did use them in the conventional way. I'm not sure his train set enjoyed a trip to the shops as much as the girls' dolls did, but he liked pushing it.
However his preferred use of a dolls' buggy was either to use it as a battering ram or turn it upside down, lie on his back and twirl the wheels.
The girls loved colouring and books. He didn't mind being read to, although he preferred a factual book. I can tell you far more than I need to know about WWII tanks for example. But any sort of craft/art? No way. In year 1 they sent him to do maths with year 2 during craft afternoon. He thought he'd had a treat. (mind you the girls wouldn't have minded the maths, but they would have been cross at missing the craft).
Football. Neither me or dh is into football. From an early age, before he'd had any interaction with other children, he was obsessed with it. He'd watch it, talk about it, want to kick a football around. He gets totally emotional about it. I remember going to the paralympics in London. We went in to watch one of the football matches. 2 teams, neither of which he'd known about before: Perhaps UAE or Iran or similar. Within 2 minutes he had decided which one he'd support and was on the floor in tears when the other one scored. 
There other ways they're similar. They all like maths. They all enjoy drama. They all enjoy the technical side of putting on a show, they all enjoy the trampoline, and they all like cooking.