The most challenging part of being a dad is self-restraint. So often your instinct is to teach and tell. I am constantly reminding myself to listen to them.
The Diagnosis had ten drafts of very significant changing, where I went through the whole book, wholesale and changed everything. Then the last year or so it was making small changes. I would do something and let it sit for three months. . . just brood about and decide I needed to slightly change something here or there. Or one character wasn't quite right. But I think everybody goes through this.