"Yeah I like who I am! I'm gonna play the piano. I HATE BAS…

"Yeah I like who I am! I'm gonna play the piano. I HATE BASEBALL!" Stanley seems to knock the guide back with his voice just as the guide did to him earlier.

When Stanley plays the piano is he being himself? I would argue that no, he isn't. The piano is something that he uses to improve his own self-esteem, not something that he enjoys for his own sake. We do not see him play the piano simply to enjoy himself. Instead, he plays to show the guide that he's better at it.