Oooh, there are so many *best* things. But I guess my favourite is hearing from people who love my stories as much as I do. It's like you live in this imaginary place in your mind, until you write it all down, bringing it to life. And then you hold your breath and release it out into the world. It's scary and exhilarating at the same time. But the very best is when someone says "I loved your book". It mean the voices in my head aren't steering me down the wrong path.