Is there stuff out there more powerful than man? Of course. As for a god, no. Think about it like this. Did God make man, or did man make God? If man made God then everything is explained. All the way down from his personality, so called plan, and why there're so many religions out there. With god/religion you've got three possibilities:
1. All religions are true
2. One religion is true.
3. All religions are false.
If man made God, then the obvious choice is number three. So no I don't believe in God. I'm 99.9999999999994% certain of that.