John is being sarcastic and mocking people. "I'm gonna find out just how boring I am and have a good time." I mean c'mon. He's saying be yourself and have fun in life and don't worry about what other people think of you.
He's also saying that all the popular songs recently have become so shallow and so easy to analyze. so he's (sarcastically) becoming just like them and saying "I'm gonna become numb and have no feeling in my songs, and forget the old me, and any song that is a deep song is depressing and will only bring you down unless you don't analyze the song." when in reality people need to analyze songs, just like poetry, but not over analyze them to the point where they lose the meaning that the person was trying to get across.
John is being sarcastic and mocking people. "I'm gonna find out just how boring I am and have a good time." I mean c'mon. He's saying be yourself and have fun in life and don't worry about what other people think of you.
He's also saying that all the popular songs recently have become so shallow and so easy to analyze. so he's (sarcastically) becoming just like them and saying "I'm gonna become numb and have no feeling in my songs, and forget the old me, and any song that is a deep song is depressing and will only bring you down unless you don't analyze the song." when in reality people need to analyze songs, just like poetry, but not over analyze them to the point where they lose the meaning that the person was trying to get across.