There is no concrete evidence to suggest, in my mind, that a God exists. It all seems far too convenient to say there is a God when pondering the existence of the universe, human kind, physical entities and emotion; I know that people say religion brings social cohesion but I would prefer to not follow a religion that puts all it's faith behind the purported existence of an omni-creator.
Religion annoys me aswell (particularly Christianity, far too pretentious and corrupt) which just increases my disbelief in a God.