I trust my first instinct at capture time, but I also trust my first instinct at edit time. Not equally, but then, what is equal? But I don't stop there. I may do a test edit, then put it away and look again tomorrow or the next day, for a fresh perspective. Not all photos will be complex enough to warrant a lot of study, but some do. In any case, a good photo isn't like a patterned wallpaper (on an actual wall), or a fancy paint job on a custom car. It's more alive than that, and can change. The analogy that springs into my mind at this moment is the long-running argument about the U.S. Constitution, to name an example of a document, which a photograph is. The argument or controversy is over whether it's a "living document" or whether it's something that should be frozen in time and left alone, with only the rudimentary amendments necessary to match important social change. Obviously you could "evolve" a photo like the Moonrise mentioned elsewhere, or allow it to be despoiled in a TV commercial, or just freeze it and move on to other things. I prefer to treat most of my photos, those that are purely art anyway, as living things that may change.