If we'll look on it on a religious perspective, in my opinion, God's only flaw when he made us was giving us knowledge on Right and Wrong. Think about it, if we didn't know what was right nor wrong, humankind would not be this, messed up, so to speak. Oh, but then again, human curiosity and weakness lead to this.
If we look at it at a scientific perspective, we really can't say where we came from or who/what made us. But the widely accepted theory is Darwin's theory on evolution. We probably evolved from a primate species a long time ago, and since evolution involves positive changes on a physiological aspect, it can be put that there have been no flaws. The evolution was for our own good.
'Nuff said. :biggrin: