- Awesome Music: Not only does every song on the soundtrack sound like a likely hit song from the era in which it was supposedly written, you're very likely to keep humming various motifs for days after you've watched the movie.
- Better on DVD: There's little argument that American Cox: The Unbearably Long, Self-Indulgent Director's Cut is the superior version of the film, giving most of the jokes more breathing room and setup. That said, the filmmakers argue that its biggest drawback is how it makes Dewey out to be more of a jerkass than a well-meaning idiot than they would have liked.
- Critical Dissonance: The film carries a 74% "Fresh" rating from critics on Rotten Tomatoes, while the User Score is significantly lower, at 57%.
- Heartwarming Moments: Dewey reconnecting with his many, many children after his Creator Breakdown and getting his life back on track as a result. While the obscene number of children is played for absurdity, their actual bonding is played as genuinely sweet. Part of the montage is even scored to a lovely cover of "Come On Get Happy."
- Ho YayTheo: [Dewey] slept with me too! And I've had confused feelings about that for ten years now!
- That, and Theo glomping Dewey when reuniting the band.
- Hilarious in Hindsight
- Justified fans usually get a kick out of the fact Ma and Pa Cox are Mags Bennett and Arlo Givens.
- Dewey's music causes a frenzy at the high school talent show, which looks very similar to the music video for "Marvin Gaye" by Charlie Puth and Meghan Trainor.
- The film is particularly fond of parodying Walk the Line. Joaquin Phoenix, the star of that movie, would play John C. Reilly's brother in The Sisters Brothers 11 years later.
- When Bohemian Rhapsody came out, nearly every other critic compared scenes from that movie to Walk Hard, including the Framing Device where Freddie Mercury reflects on his life before a concert. These critics said that they couldn't take the Queen biopic seriously because many of the musical biopic clichés Walk Hard was mocking 11 years earlier were present in Bohemian Rhapsody.
- John C. Reilly, Jack McBrayer, and Jane Lynch appearing in a movie together five years before starring in a movie together.
- Jerkass Woobie: Yeah, Dewey is a selfish asshole but considering of what happened to him...
- Moment of Awesome: Parodied. Despite Dewey's amazing life and countless hit songs, his life only comes together when he writes his ultimate masterpiece and plays it at his lifetime achievement award ceremony. He dies three minutes after he's done.
- Narm Charm: Dewey's country western cover of "That's Amoré!" is clearly meant to sound cheesy and annoying. It's arguably kind of cute.
- One-Scene Wonder:
- So Okay, It's Average: The fact that this movie came out in an era bloated by Seltzer and Friedberg's "Movie Movies" probably hurt it critically, but it was still only considered one of the better post-Naked Gun spoof movies.
- Special Effects Failure: When Pa's upper half keels over, you can see the rim of the hole in the floor where the rest of his body is.
- Tear Jerker: For such a goofy movie, it has some rather tender moments.
- Dewey sings his masterpiece... then dies three minutes later. Funny as it is, the Comically Serious framing still makes it feel like we've watched the life and times of a talented, prolific artist end with a bang.
- After accidentally cutting himself in half while fighting Dewey, his dad realizes his mistake blaming Dewey for his brother's death. He tries to tell Dewey he loves him, but Dies Mid-Sentence.
- WTH, Casting Agency?: The choices to portray musicians, for the purposes of comedy. Weirdly, all the choices somehow make sense when viewed through the twisted logic of the film.
YMMV / Walk Hard