The writer must always leave room for the characters to grow and change. If you move your characters from plot point to plot point, like painting by the numbers, they often remain stick figures. They will never take on a life of their own. The most exciting thing is when you find a character doing something surprising or unplanned. Like a character saying to me: ‘Hey, Richard, you may think I work for you, but I don’t. I’m my own person.’