As stated above, the best choice depends on your subject. The fewer AF points that you use, the faster the AF system will work and the more control you will have over the image. For static subjects, and moving subjects that you can easily track using a Single AF point. For subjects moving faster than you can track with a Single AF point use Dynamic Area AF. By using Auto Area AF mode you are giving control of the AF system to the camera, and it will focus on what it thinks is the subject, which may or may not be the subject that you would choose. Good Luck and Enjoy your Nikons!