Writers have a sadistic streek in them. Recently, in writing my novel, I’ve been thinking ‘I really need to kill this guy.’ Basically the death of one person has an important effect on those left behind. So you end up with the rather bizzare situation of being X amount through and being concerned that someone isn’t dead. I think it was Kurt Vonnegut who said, something to the effect of, that no matter how nice our character is we shouldn’t let that stop us from making horrible things happen to them. From that conflict develops and then we get our story.