Well, Moscow did have the advantage of being the funnel where all the wealth of the Soviet Union was directed and the metro was one of the showpieces. St. Petersburg metro is nowhere near as nice (though my memories are hazy).
NY Subway is terrible, gotta agree. Smelly, hot, ugly, decrepit, confusing and cramped.
Baltimore's metro is a joke, it's only one line. But it is clean and quiet.
Washington, DC has a pretty decent metro as well though the fare scheme with payment depending on your destination is really annoying.