Just a little something to consider that I didn't see anywhere down there, there's a lot of talk about the humanoid form being best because it allows a major differentiation for limbs, thus an exclusivity of movement or tools/interaction. So take a look at the Octopus, yes it uses all limbs to crawl at times but they are also highly tactile and useful for manipulating tools. -Main difference between this organic form and ours? We exist in an area of a planet that's hospitable for the development of technology and can safely manipulate it without detriment to our person or the technology (could be a twig or a circuit board). We just so happen to live on a planet with an atmosphere extremely hospitable for the exploration of science. This [i]could[/i] play a role in determining the evolution of intelligence.