I looked up photos of about a dozen separate metro stations in DC, and... they're all the same design. I get pragmatism, but those are downright depressing. The only one I liked was Anacostia because the yellow overhead lights and the bright blue advertisement screen made interesting patterns reflecting off the water-damaged walls.

Compare that to Moscow: underground palaces. Marble, statues, reliefs, arches and columns, chandeliers everywhere. Hate the Soviets all you like, but they knew how to build beautiful.

I even like the ancient 81-series rolling stock, if only because of nostalgia.