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.
YMMV: The Cat in the Hat
Big Lipped Alligator Moment: The matador scene from the song near the beginning has absolutely nothing to do with the rest of the song or the rest of the movie. Arguably the entire song could count as this, but that bit especially.
Originally, the matador scene was the setup for a deleted verse which can be heard on the soundtrack CD and accessed on the "Deleted Scenes" feature on the DVD. Needless to say, this BLAM could have been averted if the verse was left in the final cut.
In the first book, we see Mom's bed. It's a single bed. In the second book, we see Dad's bed. It's a double bed. Hmm...
A lot of that, though, would have to do with the social standards of the time. In 1958, it would have been scandalous if Seuss hinted in a children's book that a man and a woman slept in the same bed.
Well, maybe Dad was prone to snoring...
Fridge Horror: Sort of a "blink and you'll miss it" moment, but in the movie, when the Cat has the kids sign a contract, he pulls out a paper with the words "Spayed and Neutered". Perhaps Eli Stone put it best:
Guilty Pleasure: Considered by most to be an awful movie, although it does have some hilarious moments (a lot of them due to Mike Myers who, bless his soul, is doing the best with what he's given) so that watching it can cause some joy, even if you do hate the movie as a whole.
So Bad, It's Good: Some opinions on the movie. As an adaptation, yeah not exactly something Dr. Seuss would be proud of (in fact his Estate was pretty livid over it and prohibited any other live action films of his works). But on it's own, it's not that bad of a watch which has a few good chuckle worthy moments.
Took The Bad Film Seriously: It's pretty obvious that poor Mike Myers was trying his best to make the live-action film at least bearable, but there was simply nothing he could do to save the disaster.
Unfortunate Implications: In the film, the baby-sitter for the kids is the only notable "non-white" person in the cast, and she seems to be the butt of a lot of pranks while she's asleep. Also, the program she was watching before the cat arrived and her reactions to it are just...wow. Why did they do that? And in a Dr. Seuss film, of all things?
What Do You Mean, It's for Kids?: The live action film definitely qualifies: Despite it being based on a book meant for kids, the movie dealt with a lot of extremely crass humor and rather dirty things that should not be exposed to kids, to the extent that its almost as though the movie is actually missing a crap detection radar.
Dr. Seuss's widow actually was so disgusted by this that she decided not to be a part of any film adaptation of her late husband's works.