A nice video (and performance) of 6 of the Opus 25 Chopin Etudes (with manuscript scores) played by Francois-Rene Duchable. Even after literally spending hundreds of hours practicing these, they do not become stale.
Streichquartett No.1 (1930)
Streichquartett No.2 (1940)
Streichquartett No.3 (1944)
Epitaph zum Gedächtnis an Franz Kafka (1951)
Variationen über einen divergierenden c-Moll-Dreiklang (1967)
Really enjoying #seanshibe 's Profesíon. I'm not sure it's going to beat my listening record when it comes to Camino, or Dreams and Fancies, but it may come close...