@kiuku,
I don't know what a god is. I know plenty of people are eager to tell me what they think it is, and there would probably be as many different explanations as there are people. So I am not a theist, because I have no belief in any of the explanations served up by religion as to what god is.
I'm not an atheist either, because I think that even though none of the religions have an idea of god I can believe in, that is not to say that there is no cosmic intelligence behind the phenomenon we call reality. I don't know. We might meaningfully speak of such a thing for philosophical purposes, and whether or not it truly exists is completely irrelevant.