Quadrophenia: The Who
My personal favorite of the rock-operas. It swings from agressive guitars in songs like "The Real Me" and "The Punk and the Godfather" to calm beauty in "Love, Reign O'er Me" and "I'm One" through catchy, crazy, driven songs like "5:15", full of pulsing bass lines and R&B rhythms. Half of these songs are all-time favorite Who songs for me. Definitely a desert island disc.
1979 Quadrophenia was the ultimate British film based on The Who album by the same name. We learn about the Mod cultural wars!