I've talked to a few writers who have had childhood illnesses. The sense of convalescence - the feeling that you're waiting to become a real person - is quite an interesting thing. You're seeing all of your friends doing amazing things and you're just there, in a void, feeling a bit stupid. I wouldn't be able to say what I'd have been like without it, but maybe I'd be incredibly high-powered and successful. It also forced me to spend most of my time in my imagination.