Much of the time, we photograph for ourselves, to take images recording people, places, times, events, etc. Snapshots. These are for ourselves and those close to us who know the context, recognize the people in the images, and know the photographer. That shared context allows these viewers to interpret the photo and appreciate its contents.
Then there are images we think would be of interest to strangers, where the image itself becomes more important than the knowledge of who, what, where, and when. Now the characteristics of the image and the inclusion of visual clues allow strangers to view the image and derive some sort of meaning from it. There are conventions for arrangement of these visual clues (sometimes know as rules or guidelines of photography), and there are some common themes that get photographed often - some would even call these chichés.
Add to this certain human preferences (we tend to like to see face, eyes), and the mind's desire to find meaning and a pattern, and you'll see why people react to the images they see the way they do.
Sharon (sm4him) gave you a very good critique. She brings up several very salient points in talking about the angle of view and appearance of the background. When WE see something, our mind prioritizes what it feels is important, and ignores or minimizes the rest. The camera, on the other hand, sees everything in front of it, and as photographers, we need to select our angles, perspectives and exposure settings to bring to a viewer a sense of what was important to us when we saw the image. As we learn, we also become much more aware of light (source, direction, strength, harshness/softness), form (balance, form, texture) and the story (often an important part in street or urban or people photography). What you choose to show in an image gives us the visual clues which we can then use to interpret your intent.
In my signature, I quote Lew Lorton, a photographer who often posts in this forum, for he put into three sentences an entire photography course. They summarize succinctly one very good approach to photography.