I agree that this is the best (only?) way to really get to know someone. But I thik that a creed can be a good initial screen. For example, when someone tells me that "Really, the only important thing in life is money", I can be farely certain we will never have a close relationship. Or, to quote another real life example "You can either be a prick or a fool, and I'd rather be a prick." I'd rather be the fool; I understand the prick point of view but I don't want them as my friends.
A person's goals for himself says a lot about him.