When I listen to Paul Simon's unfinished demo of "American Tune," I like that he alternates his final draft lyric, "I'm just weary to my bones," with the rough draft lyric, "Or at least, I can't complain."
Simon's final draft resulted in one of my favorite songs of his, but I also like the honest, plain-spoken nature of people saying, in essence, that things could be better, but they're not terrible.
In either case, "American Tune" moves me whenever I hear it, and I hope that it's used frequently as background music for fireworks displays.