The street photography images I find more interesting don't usually involve people. Several of you wander around town with your cameras, taking pics of things like unusual doors you stumble across, or an old van painted in a hundred different colors, or interesting juxtapositions of shadows, or a bicycle perched on the balcony of a tiny flat, or an old abandoned building in the middle of town. Most images of people strolling down sidewalks don't do much for me.
indeed... "traces" of people, or things created by people can tell a more interesting story about us (or spark some thoughts in our heads) than just snapshots of our exterior shells, startled by some guy jumping at us
Not putting down street photography in general - nor portrait photography of course... There's just some things that don't work for me and my sensibilities.