Struggling to find something new

I'm having a bit of a hard time with my second beat story - not because it's a difficult topic, but because I'm struggling to find an angle that is both interesting and different. I wanted to write about subway performers in New York City, but how can I make it more than just a profile of a compelling person who brings some music into our everyday lives? This was a criticism I received in response to my query, and I completely agree that the story is vulnerable to turning into a rather simple profile. I must continue to think of how I can scratch deeper beyond the surface. Back to the drawing board...