I forgot to mention the rear doors. The "ambulance doors" (usually referred to as barn doors but they are really cargo doors) are great for moving cargo and people from the rear and are the most common. The clamshell doors (lift gate and tailgate) are preferable to many, but are difficult to climb in and out of the back or to load heavy materials. I have both, I think the clamshell doors look the best but the barn doors are the easiest to use and they don't look bad either.
