Photography - Most photographers will tell you that it is all about the light - and they'd be correct.
The term comes from The Greek word phos, photos - light and graphos - writing. (Wiki)
I've said it many times "follow the light" because it is the interplay of light on the subject that makes an image interesting.
However - just as important for me is what is the focus point of the image. What do I want others to see in that image? What story am I telling?
When I'm shooting for fun, I most often shoot with a shallow depth of field (large aperture) and have the camera set for single area focus or focal point. This tells the viewer what I want them to see in the photo..
It also forces me to find (to me) the most interesting 'subject' within the frame.