You've spent a little over three hundred years building trust with the King of Hell. You had sold your soul to protect someone else, instead of in some selfish way like everyone else, and nobody respected you for it. You made it your goal to become Crowley's right hand man. And you achieved it! Now you got to stand by the throne all day, leaning on it, sitting on the arm of it, whatever you wanted. It was fun to see the other demons' faces.