but see are odds really predictable for anything of that nature when we dont/cant even understand the size of the universe or the universe itself?
i dont really understand your question about peoples sightings? are you asking what are the odds that they look the same or what are the odds that people actually see them or what?
What i kinda do is relate to us.... if we as a people were to find other planets with 'intelligant' life, and say one planet has life with a form of gas we cant breath or is toxic to us, and one planet is all life is underwater, and one planet is a species that looks like monsters to us... and one is a planet that resembles ours and has life similar to ours, Which would we phiscally visit?