Bevvil pretty much hit the nail on the head, but something else I'd like to add...
You already said "If, indeed, there is a God and he created us and gave us all of these laws," in reference to the previous discussion of the christian's God. So, yes, I am assuming that, because it was already granted by your argument.
Wether or not God exists (or wether he exists as the Bible describes), and wether or not your laws are better than God's laws, are two completely different arguments. Granted, if God did not exist, or existed as a different entity than described in the Bible, then your argument would have more substance to it. However, that's a different scenario than the one that we're currently discussing (the one that you presented).
If you don't want to believe in God, or any god, that's your business, not mine, and I'm not trying to change that. I'm just pointing out the flaws in your logic when you say that, in a scenario of there being a higher, absolute authority over you, that you can safely ignore it's laws and follow your own, and pointing out the flaws in assuming that you know better for yourself than anyone else, when still operating in the scenario of an omniscient entity that, by definition, knows all.
Like I said, I'm not arguing God's existence. I'm simply arguing that you're not as all-knowing or all-powerful as you've said you are, when compared to a being that has (hypothetically) absolute knowledge and power.
Moo.