I would say RAW also. Or RAW + JPEG. RAW files are unprocessed so they can be a little discouraging when you see them straight out of camera, they require atleast some minimum post processing, so it might not be too good if you aren't capable at post processing them. If you shoot both, then the settings for picture style in the Camera ( like Vivid, Landscape, Natural etc etc. ) will be applied to the JPEG while the RAW will stay untouched. That way you can see a rough example of the processed pic straight out of camera, but still have the RAW to revert back to. Think of the RAW as sort of a Digital Negetive. It doesn't change so you can always go back to it. Plus your out of camera post processing is much more capable than what your camera can automatically do to the picture. Thats why most people prefer to use RAW as well as the fact that the RAW file holds much more information so it makes it easier to correct issues like exposure.