Many people choose white as the color for their automobile. Some simply prefer it for its own sake. Others who live in hot climates select white because it reflects the sun's rays and reduces the expense of operating the air conditioner.
But the way I see it, there's a major problem with white cars: it kills one's perception of the shapes of an automobile's surfaces.
To Illustrate my contention, let's take a look at some Mercedes Benz E350s.
As you can see, darker colors show highlights that help visually define the metal sculpting that has become increasingly elaborate in recent years. Surrounding objects are also reflected much more strongly, which some people might find objectionable. Perhaps that's why silver is a popular color: it reflects sunlight while making the sculpting more visible than does white paint.