There are three main elements, Content, Composition, and Technique. Lighting and depth of field fall under technique. Intent is usually reserved for legal proceedings.
artBob wrote:
This may sound silly, but it has been my experience in teaching. You need to be concerned about: Subject, Intent (why take the pic, what moves you), Composition (reflects the intent, directs the eye), lighting (reflects the intent, directs the eye), depth of field (reflects the intent, directs the eye).
Each of those has many variations and techniques. If your shot does not look right, explore whichever area you need to work on. This goes on for approximately......forever.