Norman, there can also be different audiences with differing expectations and, regardless of those expectations, differing reactions. An outside audience (those who do not know the subjects in photos) will have different insights and responses to photos of people from an inside audience (those who know the subjects). Those who know the subjects may well feel something insider-ish from a photo made by a photographer who also knows the subject that the outsider audience may simply not be able to get. It also amazes me sometimes how much outsider audiences can wind up getting. Also, those who don't know the subject may tell a photographer that he or she seems to have captured the subject's "essence," a concept that doesn't really work for me though I get what people mean when they say that. On the other hand, sometimes the subjects themselves and people who know the subjects say they're surprised by a portrait in a positive way when it shows them someone in a different yet telling light, in a way they hadn't before envisioned or imagined. In that last case, we're kind of turning "knowing someone" on its head, where the viewer's knowing someone may allow a photographer to introduce them as a stranger in a photograph . . . sometimes in a really cool way.