Before having children and jumping on the writing train, I was a school teacher. I taught 11 - 13 year olds. Such a great age and so much fun to interact with.
So - when I decided to really get serious about writing, one of the things I carefully considered was making sure my work was easy to read, fast-paced, filled with a ton of action and dialogue, and because I was one of those girls that hated reading at school, I also wanted to make sure each of my stories had a strong romantic element. I swear, if books like the ones I write and the ones that are readily available today were around when I was a kid... I would have gotten into reading a lot sooner.
This is why I have started writing YA. I have some adult stories that I want to write eventually, but for now YA is where I'll kick around. The beauty with YA is that adults seem to enjoy it just as much as teens do :)
I think books are filled with magic. I think they ignite the brain and teach children things they can't learn anywhere else. I take my hat off to people like J. K. Rowling who have written books that have children scrambling to get to the bookstore. Now, I'm not sure if she specifically wrote those books with her children in mind or whether she just had a really massive story that she had to get onto paper, but I think it's important to consider what motivates us.
Why do you write?
What do you want your books to achieve?