Perhaps one's appreciation is also dependent to a certain degree on one's willingness to participate in the viewing experience.
In today's culture many have come to expect to be passively entertained, or engaged, or moved, or informed, or whatever, without ever realizing that they must also actively contribute to that process in order to fully experience it.
If you stand in front of a photograph and simply wait for it to speak to you, you could be in for a long wait. The viewing needs to be participatory. Same with a book. You can stare at it on the table until the cows come home, but until you make the effort to actually open and read it, not much literary appreciation is going to happen.