My second goal would be to share with others some of my human experience, to give courage where courage is needed and let my readers know that they are not alone in the struggles to cope with the vagaries of life. That is a hard one - an impossible one really. It's like asking which of my three children I love best and why. I can see that they are the ones my readers didn't love as well either, so I try my best now to invest myself as fully as possible in all my books. Again, this comes down to universality.
Trends come and go.
Real writers pay them no mind. By the time you write for the latest trend it will be gone. You must write what's in your heart, what only you can write, and your books will find their readers. You have to learn to write what children want to read and to do that you must work on getting back in touch with childhood. It's difficult to get a children's book published because the competition is fierce.