I find Dallas horrifically laid out. Too many suburbs, too many big roads, waste of space. Pittsburgh and all the other cities that boomed during the 'great' periods of America have the same problem, which, notably, San Francisco and NYC have somewhat less of -- big roads for big cars, and big garages to take those cars home to.

The problem isn't sparseness or density, it's a combination of readily available fossil fuels and mindset, I believe.