!! The book and the movie
* AwesomeMusic: [[https://www.youtube.com/watch?v=3L2jexRe8W8 "It all runs together"]] playing at the very end when Marley is put down. Marley's death aside, any pet owner who experienced putting their dog down likely shed a tear listening to this track thinking of their own dog (or another beloved animal for that matter.)
* BaseBreakingCharacter: The John and Jenny themselves. Debate on how sympathetic they are of their frustration towards Marley still rage on. This is less so with the movie version because of AdaptationalHeroism.
* HilariousInHindsight: Reading the part with Marley struggling to behave for his brief film role in the 1996 film ''The Last Home Run'' and John enjoying their time in the spotlight becomes this when both Marley's book and film gained considerably more fame than ''The Last Home Run'' did.
** A mixture of this and heartwarming: when the film was in production, John decided to keep Woodson, one of the Labrador retriever puppies that was used to play puppy Marley.
* ItWasHisSled: Marley gets put down in the end.
* {{Narm}}: A lot of Owen Wilson's acting can come off as this. As [[http://www.theguardian.com/film/2009/mar/13/marley-and-me-film-review one critic]] put it:
-->Brace yourselves, everyone, for the emotional final scene, when Marley faces the final curtain in the vet's treatment room, with blond, bland Owen at his side. And in the cinema, all of us tough, cynical critics had tears welling in our eyes, swallowing hard; our lips, so often curled in a cheap sneer, were now trembling, because of the same desperately sad thought: "Owen Wilson used to be really good ..."
* SpiritualSuccessor: To Literature/OldYeller.
* TearJerker: Especially if you've had dogs. Doubly so if you had to put it down or it died in some way.
* TheOtherDarrin : Multiple dogs play the part of Marley, which is common in Hollywood because often each dog performs a different trick (running, chewing, barking, etc.), and because Marley is shown as a puppy, an adult, and a senior dog. However, they don't even TRY to disguise the very different looking Retrievers who play Marley, resulting in a jarringly different appearance between the adult and senior dogs.
* ValuesDissonance: Some of the Grogans more abusive behavior tends to make the audience perceive them as less sympathetic in modern eyes as oppose to the 90s period that the book set in.
* WhatDoYouMeanItsNotForKids: According to Grogan, he got a ''lot'' of dirty looks from parents who bought the book for their kids expecting a happy dog story. He eventually allowed child-friendly versions focusing more on the doggy antics.
* TheWoobie: Marley becomes one in his later years.
* WTHCastingAgency: For some, casting Owen Wilson as John Grogan.

!! ''The Puppy Years'' sequel

* SpecialEffectsFailure: Very shoddy CG used.
* TheyChangedItNowItSucks: Was obviously trying to cash in on the ''Air Buddies'' movies considering how much more childish and slapstick it is. Lacking any of the charm and heart of the previous entry.