So let me ask you this, what kind of God possibility are you open to? Is it just a generic God? Are there any rules associated with this God? Do you get a prize at the end for believing in this generic God?
What I'm getting at is, what do you get out of leaving this possibility open? I pretty much leave all possibilities open, as long as they are realistic possibilities. Hawking cannot disprove God, just like he cannot disprove magic fairies. All he can conclude is that based on his findings, there is NO evidence of a God. Which I agree with.