The last time I watched this I was 15, & I'd thankfully forgotten what a terrible, terrible film it is. Have there ever been any good films based on albums? Maybe so, but none based on a The Who album. Quadrophenia was originally a double album, which goes some way to explaining why this film is twice as bad as you can possibly imagine it's going to be.
It basically depicts youth culture as a refuge for inarticulate, unimaginative and non aspirational idiots
While this has obviously always been the case, you'd expect to find a few interesting people knocking about any large group. In Quadrophenia you get the entire cast of the British soap and drama industry, so the most interesting thing becomes spotting who hasn't been in The Bill.
You do get the fantastic Phil Daniels in the central role, and "you killed my f***ing scooter!" is genuinely funny. You get the also excellent Ray Winston taking a kicking from a gang of lads uniformed in parka coats - a chilling and almost Clockwork Orange moment.
You also get Sting's terrible dance style inflicted on the world. He's supposed to be cool - yet he looks like everyone elses dad!