French music is really very sensory, and appeals to sense of smell, taste, touch. It can be languorous, and almost erotic. Russian music is very subjective, sometimes whiny, breast-beating 'Look how I suffer, look how I suffer!'. German music is, to use your word, metaphysical. It really asks those existential questions of 'How do I relate to the Universe?', 'Is there a heaven?', 'How am I like a brook, or a leaf on a tree?'. I know this was the music that most challenged Schnabel. He said Mozart was the most inaccessible of the great masters, because with the fewest number of notes, he accesses the deepest levels of human awareness and experience.