What if you could choose from a variety of engines or wheel sizes for a specific car or truck in GTHD. You know how the Dodge Magnum comes with a wimpy 160hp V6 all the way up to a Hemi V8, and the new Escalade has the option of 22inch wheels or the standard 18s. Also how about adding a Test drive feature, because in GT3 it was kinda hard to earn some chips, and why waste them on a car that you don't even like after you buy it. Last but not least, what if you get tired of the color of your car after a while, but like the car, why not have the option of getting it painted instead of buying a new one(personally I like stacking up miles on the cars in GT4)?