Left handed through and through, runs in the family on dad's side.
DH is a lefty, older mom.
One child is a lefty, other is a righty.
The single right hander has learned to hang clothes the left way.
She was in gymnastics, and now dance, so can do turns both directions easily. She has learned to adapt!
I am more creative, DH and DS are more analytical. But we are all pretty high on the "tests" of how we draw, kick, step into pants, reach out, etc...
DS and DH have "engineer's handwriting," in that they take the shortest amount of strokes to form letters. I do a half cursive and print. I loathed handwriting as a child. When I homeschooled my kids, I used Handwriting Without Tears, and recommend it for any child.
I play piano. The right hand typically has more intricate fingerings. I play about equally, but it may because most music has left hand with chords and right hand with melody.