Well, according to Tim. One of the origional ideas for a main character would be an Ostrich who has multiple personalities. But then they decided that was just weird and went with a human lead.
"A few times in my life I've had moments of absolute clarity. When for a few brief seconds, the silence drowns out the noise and I can feel rather than think, and things seem so sharp and the world seems so fresh. I can never make these moments last. I cling to them, but like everything, they fade. I've lived my life on these moments. They pull me back to the present and I realize that everything is exactly the way it was meant to be."