1. PT CRUISER (2001-2010) You might argue that the PT Cruiser was the first "box car" although it was not very boxy. But it had all the basic box car design elements: Funky retro design, a raised station-wagon like roof, kitchen-chair like seating, all based on an economy car platform. They were not expensive cars, but got decent gas mileage and hauled your stuff around and looked a lot cooler than the Dodge Neon they were based on.
With the wheels pushed to the corners of the car, the Soul, like most box cars, rides better than most economy cars of the same size.
While the great unwashed masses flock to the SUVs, maybe thinking "outside the box" these days means thinking inside the box.