To me the Big Bang falls down on it's origins. I am in no doubt that the laws of physics permit an event such as the Big Bang to occur but were did the original matter come from? Where did the energy come from?
Pre Big Bang did the Universe exist? Who or what caused the matter and antimatter in the universe to exist? The only thing that I can see that would cause it to exist is something outside of our own "dimension" if you will. I'll freely admit that such a conjecture doesn't prove the existance of a God or omnipotent being that would create it but it does leave that avenue open. To me the odds of us perfectly forming and being placed in this Universe as we are point to some sort of intelligent creator. That is my hypothesis although I believe it to be more than that.