Thank you for your thoughtful and insightful responses. A theme in the responses was the notion of distance: either in time, emotional space or in Michael's good idea, physical space and thought (imagination). I also appreciated the reference to purpose. Usually I ask 'why' I am taking a picture in the first place as forcing the articulation clarifies many diverse elements of the image. The 'why' isn't, of course, always evident.
It is true, as was mentioned, that direct purpose dictates the judgment about the image inasmuch as there is a standard by which to judge. A commercial picture is 'good' if it describes or depicts what was desired. A fine print, on the other hand is good for me if it is evocative, usually best if it inhabits the borderland between beauty and emotion (not necessarily warm, fuzzy ones). Maybe the beauty emerges out of the print itself rather than the specific object being photographed.
Since starting this thread I have read Minor White's article entitled 'Silence of Seeing', While the article focusses on criticism (not just the negative variety) it highlights the state and stages of photographic criticism. The following extended quote was noteworthy:
"I am viewer, photographer, critic and image at various times and in random sequence. Nevertheless the larger creative cycle turns within relentlessly, though not evenly: inception, the waxing upturn, the full flowering of the idea-feeling force in the image, the waning downturn showing images to friends and benefitting by their responses... All the phases have characteristic and emotional rises and falls...
"In the role of photographer I rarely can observe in myself the currents and cycles of all these forces working, beyond an intuitive recognition of rapport with livingness. In a state of heightened awareness an intuitive recognition of living energy accelerates work on an image. My energy is expended in the rite of exposure. but things go differently in the role of the viewer. I can see the whole inner-outer action that results in response. At htis stage I become aware of what was going on during the exposure ritual. Long years have given me faith that the photograph made in a peculiar kind of half-seeing and half-sensing its importance it will reveal to me later the whole of the experience. I can make the journey in leisure. To be sure sometimes I am surprised at what the journey reveals that I had no inkling of during exposure.
"In the role of the critic (enlightened and knowledgeable viewer) I am saddened when I feel obliged to pass judgement. Hence I feel that I dare not make evaluations from anything less than the total experience of the image in a state of concentration and contemplation. I feel compelled to give out of my deepest self, response, and out of God knows where, judgement.
"No matter what role we are in - photographer, beholder, critic - inducing silence in seeing in ourselves, we are given to see from a sacred place. From that place the sacredness of everything may be seen."
I find that the work of photography is both serious and fun. Ultimately the photographs that matter to me are the ones that come from some deeper place and then take me on a journey back to either that place or new places. So I can be concerned about tonal ranges, compositional arrangement, lighting, subject matter, ad infinitum, and also the personal experience. When these elements work together, then it is good.
One of the joys of photography is that it can't ever really be figured out, that there is always more to know and that it is possible to grow as a person through the process.