- Channel Hop: The rights to the TV specials. A couple of them were produced by MGM's television division, so they ended up with Turner Entertainment, who also produced The Butter Battle Book, and Daisy-Head Mayzie, which was animated by Hanna-Barbera, with Warner Bros. distributing. The other specials were produced by either DePatie-Freleng Enterprises or Marvel Productions, and the Geisel estate retained the rights to them, with their distribution rights transferring to multiple companies, notably Universal for the DVDs in the early 2000s. Today, all the specials are distributed on DVD, Blu-ray, and most digital services by Warner. On the other hand, three of the DFE specials are on Hulu courtesy of CBS, utilizing very worn-out prints sporting the "CBS Special Presentation" intro.
- Regarding the film adaptations, in the USA, How the Grinch Stole Christmas!, The Cat in the Hat, and The Lorax are all owned by Universal, with the first two being produced by Imagine Entertainment, Cat being co-produced with DreamWorks, and Lorax being produced by Illumination Entertainment. On the other hand, Horton Hears a Who! was produced by 20th Century Fox and their Blue Sky Studios unit. Outside the USA, Cat is handled by Paramount, since they gained the pre-2010 DreamWorks library through their short-lived merger with the studio.
- Child Hater: Averted.
"Well, like anyone you know, there are good kids and there are creeps. And I like the good ones and I don't like the creeps."
- Creator Backlash/Old Shame: Seuss grew to dislike his offensive caricatures of the Japanese, especially after he visited post-war Japan, and wrote Horton Hears a Who!! as an allegory of America's occupation of Japan. He even dedicated it to a Japanese friend, Mitsugi Nakamura.
- Creator Breakdown: In the late '60s, his mother passed away and his first wife committed suicide. His resulting depression inspired the much darker I Had Trouble in Getting to Solla Sollew and The Lorax.
- Funny Books, Boring Author: Unsurprisingly, Seuss wasn't exactly as colorful as his works and was always afraid that children would reject any notion that something as wild and imaginative as The Cat in the Hat was written by a plain-looking grown-up.
- He did have his quirks, however. When stumped on something to write, Seuss would sit down in a closet full of silly hats with his publisher, and they'd sit there wearing different hats until he had a new idea.
- He Also Did: Seriously, who today expected Dr. Seuss to have drawn political cartoons during World War II? He also ghostwrote a popular "Biography of Donald Duck" book for Disney.
"It was all full of naked women, and I can't draw convincing naked women. I put their knees in the wrong places."
- The Seven Lady Godivas, one of Seuss' few books written for adults. It's also one of two books of his to go out of print (the other is The Cat In The Hat Songbook.) Seuss himself wasn't proud of it, and henceforth stuck to writing for kids.
- I Am Not Shazam: "Dr. Seuss" was neither a doctor (at least, not when he started writing - he was later awarded an honorary one by his Alma Mater), nor did he have the last name of Seuss (that would be his middle name). Furthermore, the name "Seuss" as it's pronounced in much of the English-speaking world today (as rhyming with "noose") is actually a mispronunciation (Seuss's family was German, and the name actually rhymes with "Royce").
- Name's the Same: Mayzie, a bird from Horton Hatches the Egg and Mayzie of Daisy-Head Mayzie.
- Also used in the opening of the movie of How the Grinch Stole Christmas, which implied that these were the same "Whos" from Horton Hears a Who and showed the entire action taking place on a snowflake.
- The two Vlads in the Horton Hears a Who movie.
- Reclusive Artist: He rarely gave interviews or appeared in public, partly because he wanted his work to speak for itself, but also because he was incredibly shy.
- What Could Have Been: Before his death, Dr. Seuss wrote a script for a film version of Oh the Places You'll Go with 13 songs that would have told the story of a boy not wanting to be born and the Cat in the Hat guiding him through the ups and downs of life.
- Upon being challenged to write a book using only a list of 250 words that young children would be able to learn easily, Seuss' first idea was a story about a queen of zebras, only to discover that neither "queen" nor "zebra" was on his word list. He then toyed with the idea of a story about an adventurer scaling Mount Everest at 60 degrees below zero, but the words "scaling," "sixty," or "degrees," and "Everest" weren't on the list either. In the end, he decided to write a story based on the first two nouns on his word list that rhymed - and the rest is history.
- Write What You Know: The Grinch is one of his most personal characters. Seuss' house and studio were on a hill in California and, every Christmas, he would look down in disgust at all the cheesy decorations and lights adorning the houses below.
- "And to Think That I Saw It on Mulberry Street" has parallels to the German ballad "The Erl-King / Der Erlkönig", which he memorized while in high school.