judgement of a photo being "great."

When i describe a photo being 'great','beautiful, or etc, it is usually because i have a connection to that photo. sometimes when i look at a photo and think its great is becaus ei can relate to what is showing in the picture and the story behind it. Sometimes if the potrait is really unique i can almost feel like inm there because there is so much dteail going on. So really i more often would describe a picture as 'great' not because of the tachnical details, but because i can actually feel like I am there, it realates to me, and i can understand the deeper meanings and reasons behind a 'great' portrait.