Upon starting a new project with a client, I may ask several questions such as:
What are you looking for in a photographer? What do you envision for your personalized photo session? Tell me about your favorite photograph of your family (child, self, etc) to-date; what is it about this photograph that makes you fall in love with it over and over?
If we seem to click and are the right fit for each other then I would start asking more specific questions about the session/event they’re looking for.