Actually, I was thinking along the lines that hero or villain would ultimately be human. In the story, both Heaven and Hell recognized the potential humans had to turn the tides of war in their favor. So I think it would make more sense if the villain or hero would be human, not demon or a holy character. Also, choosing sides would have more depth if both hero or villain would be human. It wouldn't really be choosing sides if you were a demon, because we already know which side it'll be in. Anyways, more opinions are really needed on this. I would like to see the next Diablo game allow you to choose sides. What do you think?