Quadrophenia, by The Who (1973): The second of Townshend's Who rock operas, Quadrophenia is a bit more sprawling that Tommy and a bit more adventurous, as well. In addition to a fairly audacious concept (each of the band members represent one part of the main character Jimmy's fractured personality), Townshend uses a broad sonic pallet (synths, horns, sound effects) to set the mood. The songs themselves are some of The Who's most powerful - "The Real Me," "5:15," and "Love, Reign O'er Me" among them. The late monster rhythm section of Keith Moon and John Entwistle rule this album, from the very get go (Entwistle's bass licks on "The Real Me" kicks my ass every time). Over time, Quadrophenia has become my favorite of Pete's big idea albums.