For me. such pictures is usually a starting point of story. Sometimes story is untold, undiscovered, but still present. While social interactions are present in this stories, they rarely plays main role. So social interactions on this pictures is limiting for me, they defines what should be discovered.
Also, picture must touch something inside of me, there must be some kind of relation butween me and girl on the pic. I can say, that my source of validation is feeling, that picture can be kind of selfie, when it captures not looks, but someting deep.
"Captain Haskell, clearance is granted"