I favor photos with an obvious subject, except for abstracts. Sometimes, I take a shot just hoping the subject will be recognizable, especially for my birding friends. In such cases, I may have trouble later finding the subject in the photo. I think of this as part of the process of learning to see. More often than not, I crop photos (tightly) to make the subject obvious, but I left these unedited to illustrate the challenge in the field and later.