Tommy is probably the best known rock opera since it has been an album, a movie, and a stage play. The term "Rock Opera" grates on me, I think Rock is Rock and Opera is Opera and the twain should never meet. To me, trying to make rock into opera is a sign you're ashamed of rock and want to do"legitimate music".
Tommy (as an opera should be) is entirely sung. That would have all been well and good IF the songs were good, but unfortunately "Tommy", "Pinball Wizard", and "I'm Free" are the only three songs that worked for me....and yes that includes "Acid Queen" by Tina Turner and I'm a big fan of Tina's.
Since I have an aversion to "rock operas", plus Pete Townshend grates on me (I think it's his self-importance that is off-putting), I should have steered clear of Tommy. However, I had fond memories of seeing Tommy on the big screen when it was originally released, and I even saw a stage production in Atlanta many years later. The best thing I could have done was to have left Tommy in my memory banks and went on with my life. I found either my tastes have changed or the movie really wasn't very good to begin with. Either way, it was a slough to get through this film. The next time I want to watch something with "Tommy" in the title, I'll choose Tommy Boy.