"Cass.... are you.. God?" - Dean to Castiel. The look of heartache and regret on Cass's face when he responds no. You can tell when he went around fixing things and playing God he truly wanted to do right and to set things right. Even if the power was too much for him and he had dark ways of doing it. It was meant with good wholesome honest intention. Poor Cass. He just wants to help and make things right so much. Love him! He's everything I feel an angel should be. Loyal and loving to humankind and wanting to do what is right in the absence of the almighty divine in a chaotic pained world.