These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
To be fair, some versions of the musical do feature the Local Lad as something of an antagonist, but they're still pretty harmless in comparison to the other villains.
Awesome Music: "I'm Free" for one, which feels a lot harder than it sounds.
Just about the entire soundtrack, really.
Covered Up: "Eyesight to the Blind" was originally by Sonny Boy Williamson II. The Who had also intended to use Mose Allison's "Young Man Blues" on the album, but couldn't find room for it, and so it had to wait until Live At Leeds to be covered.
On top of that, when the Who performed Tommy on tour in 1989, they used Eric Clapton's arrangement of Eyesight, from The Movie, rather than their own arrangement from the album.
Tommy baptizing his mother after singing "I'm Free" in the movie.
Harsher in Hindsight: "Sally Simpson," where a girl is injured during a riot at a speech by Tommy. A real 1979 Who concert had several people killed outside the venue when people rushed to get in.
Hilarious in Hindsight: In "Go To The Mirror!" the doctor thinks about the isolation shock caused when/if Tommy's senses return. When he does get them back, he mobilizes his cult of personality. Subverted later when his followers leave him thanks to the unorthodox views he got from his experiences.
I Am Not Shazam: A common mistake even among the fans is to call the character who sings "Pinball Wizard", well, the Pinball Wizard (or, in the movie's case, Elton John). He's actually called the Local Lad according to the scripts for the movie and the lyric sheet for the original album.
The lyric sheet of the original album also shows that the name of the character singing "The Acid Queen" is actually called The Gypsy.
One-Scene Wonder: Elton John's appearance as the Champion/Local Lad in The Movie is one of the most talked-about parts of the film (he even got third billing after Daltrey and Ann-Margret), and he barely even gets five minutes of screen-time. It probably didn't help that it was released in the UK the day after his twenty-ninth birthday.
Squick/Nightmare Fuel: Every one of the three Villain Songs. What Kevin, the Acid Queen and Uncle Ernie do to Tommy are one after the other on the album (though "The Acid Queen" and "Fiddle About" are separated by a ten-minute long psychedelic instrumental), making things worse.
Made so much worse in the London Symphony Orchestra recording. Whose idea was it to cast the Beatle who sang all the cute kid's songs as Uncle Ernie? (Warning: may lead to constantly having to lift the needle off The White Album before it gets to "Good Night".)