Well, there's really no "correct answer" as it were.. it's usually just a matter of opinion.
I, personally, believe somewhat in these things.. but on a different level. Rather like emotional representations of said supernatural creatures. Werewolves, for example, could just be a manifestation of anger.. total and unadulterated RAGE!
Vampires.. are different to many people. I see them as charismatic and beautiful. Rather the way that Anne Rice portrayed them. They could be psy-vamps or any number of other things.
I'm not really saying this is the definate way to believe things.. I'm not even totally sure how I believe them!
"The whole idea of compassion is based on a keen awareness of the interdependence of all these living beings, which are all part of one another, and all involved in one another."
"A life is either all spiritual or not spiritual at all. No man can serve two masters. Your life is shaped by the end you live for. You are made in the image of what you desire."
Thomas Merton, Trappist Monk