"Photography is an art of observation. It’s about finding something interesting in an ordinary place." - Elliott Erwitt
Of course, different people find different things interesting, so this isn't always easy to explain. But for me, you shouldn't have to explain it - you either see it or you don't, and if it needs to be explained, then you haven't got it. I understand that some people just won't get it, and that's fine - we are all different.
I do enjoy most aspects of photography, but it's the street and urban imagery that excites me, particularly scenes that reflect the way the human race influences all that we see and do.