Here's what it comes down to for me: it is impossible to either prove or disprove the existence of any god. But before you can even try to offer evidence either way, you first have to define what you mean by 'god'. If you're referring to the Abrahamic god, then no, I don't believe that such a god could exist, and the best evidence I can offer is reality itself. Think about how god is defined in the Christian religion: he is all-knowing, all-powerful, and all-good. These three cannot coexist at the same time in the same deity, with the world being the way it is. One of them has to either be amended, or done away with completely. But, since Christian theology is unmovable on it's definition of god, this becomes an impossibility to believe in their gods existence. And we can use similar arguments on any of the monotheistic religions. Polytheism has similar problems. If many 'gods' exist, how can you continue to call them god? You're definition of god would have to be something less than the monotheistic one. Pantheism, too, is not without it's problems. They say 'all is god'. But what do they mean by 'god'? You can use other terms to describe the interdependence and connectedness of all things without using god-terms. Deism, to me, offers the best possibility of being true. It comes closer to the ancient philosopher's view on the ultimate deity, such as is found in the works of Plato and Aristotle. But, for me, no god-concept is needed to explain things the way they are.