Originally Posted by
Manfred M
There will always be an element of subjectivity in any evaluation, regardless of how objective we try to be. A person who is not comfortable with spiders will likely have some built-in biases when he or she looks at an image of a spider, regardless of how well the photographer has executed the image. Someone who has a fairly socially conservative outlook may have a built-in bias against nudes.
One would think that we can avoid biases evaluating an image from a technical standpoint; correct exposure, appropriate depth of field and appropriate shutter speed all seem to be fairly straight forward. Moody lighting might be viewed as incorrect exposure. Shallow depth of field may work in the eyes of one viewer and work less well in the eyes of another viewer. I have seen images criticized for showing to little or too much motion blur. Again, our personal tastes will impact how we review images.
Dan mentioned some of the "rules" one finds in bird photography. There are similar views when it comes to landscapes, portraiture, architecture, macro photography, sports photography, etc. I have seen judges resort to some of these "rules" in cases where they might not have been relevant.
So congratulations on wishing to avoid personal preferences when critiquing work, but I have found that our own personal feelings, experiences and views can and will show up when we evaluate an image.