This is a great thread, just what I needed to be reminded of.. and let me chime in with my experience: Few months ago I was extremely depressed.. well, it hasn't been cured but let me tell you, loading up my ipod with "Dirt", "Facelift", "Master of Puppets, "And Justice For All"... has done wonders. Seriously! One night i stayed up for hours listening to these albums and others (Weezer's "Pinkerton", Pantera's "Cowboy's From Hell", Radiohead's "The Bends" and "OK Computer"...etc.).. and somehow it was so therapeutic. I don't understand why, but it helps.