Ponder the fineness ratio of the Woodruff Special.
It's a hoot to watch him get in. He crawls in head-first, rolls over and pulls his leg in.
Have you seen a decent chop on a New Beetle? The shape seems so rigid and symmetrical, I'm not sure how to pull it off. The factory lower the roof in a few concepts, then in production. They really changed the contour.
One of my favorite cars is the GTI 650 W12:
It has sort of an internal boat tail. Maybe you could do something with the side windows and backlight and leave the metal alone