I guess I am an Agnostic, and I guess because of the same reasons Antares just described. Plus I don't really care, and by that I mean I really don't see the reason why I should ever be able to see the real truth behind our and the cosmos's existence, it's simply to grand, too alien, too ancient. I do like to play with the though of why and how, but to truly believe, no not for me, I see no reason.
but this short documentary is rather funny, haven't really figured out how all their experiments work though.