I'm an agnostic, and as such, I don't believe humanity has the means to prove the existence of god nor his non-existence, so, I admit my ignorance regarding this question and live happily concerned with things that make my most likely ephemeral life on Earth more enjoyable. As a matter of instinct and from what I am able to observe, I don't have hope in the existence of God, so you may call me an atheist agnostic, and if there really is a creator, I'd rather believe in an evil/unconcerned one, based on what I see in this world and my own life experience, or even in a superior form of life which has created us, like those beliefs about reptilians and such.
Actually, the only thing I'm completely sure of is my own existence, not even my physical existence, but my cogito,