It was so good that he had to walk away. When he would do stand up shows people would shout "Rick James, Bitch". He was tired of it, I don't blame him.
youtu.be/wRAy-sFoWSc
This is the real reason why he left the show. Some say it was just a joke but you can see it in his face that it actually happened. We gonna have to wait till 2016 for him to come back after Obama leaves .