The idea that he is haunted by what humans do I just loved that irony because we are all so afraid of dying. Originally, he was a very different voice. He was supercilious. He was enjoying his work too much and he would say creepy things, which is the obvious.
Every time you experiment with something, every time you've tried something, you can cross that off. Every time you find something that doesn't work, you're a step closer to what does work. Just do the work every day -- and do it and do it.