We’re all agnostics by definition, since no one really knows the definite answer. People may not admit that they are agnostics, but they are agnostic nonetheless. But I call myself atheist, because I reject any kind of religion, and I am very certain that the god(s) and metaphysical aspects of these are simply superstition and calculated efforts to scare and control people. If (IF!) there is indeed some kind of god, it will be totally unlike anything religions try to tell us.