I have always enjoyed working with people and starting a job with a good conversation. To get a good photograph you have to know how to listen to the client to know what they expect from their image.
Once I understand what a client is looking for in a photograph, I focus on the technical aspects such as choosing the right light for their face, styles, etc.
At the beginning my photos were looking for a theme, a reason, but with time (or age, I don't know) justifications are less and less frequent and I simply do what I feel like and let the result speak for itself.