The process of producing a project is one long string of delight and anxiety, but I think the real thrill of animation would have to be drawing the pictures.
The multiverse as a real physical construct within physics overlapping with a more mystical understanding of many possible worlds - the notion of there being a root down at the quantum level between intention and reality, between consciousness and existence - it's not a matter of trying to explain the mystery of magic away with a pat mechanism of a pseudoscience, it's just a matter of trying to ground it in a domain.