And You Thought It Would Fail: Beatrix Potter at first had absolutely no luck finding an editor who liked The Tale of Peter Rabbit. Eventually, she used her family's wealth to publish it privately, and after some moderate success on this limited distribution, an editor was convinced that it would sell and, well, it certainly did.
Angst? What Angst?: Nobody seems very bothered by the fact that Peter's dad was made into pie before the story even started. His mother mentions it offhandedly as if it were just a minor mishap. However in the 1991 animated musical that aired on HBO Family's "Storybook Musicals" Peter's mother does mention about what happened to Peter's dad in a more somber tone.
First Installment Wins: While this is the first book created by Beatrix Potter to star Peter Rabbit, there is actually a sequel to it called The Tale of Benjamin Bunny where Peter's cousin Benjamin Bunny visits Peter and convinces him to head back to Mr Mcgregor's garden since Benjamin tells him that the Mcgregor's are out for the day. Peter is still paranoid after the events that happened in the first book. Beatrix Potter later created stories titled "The Tale Of the Flopsy Bunnies" and "The Tale Of Mr Tod" which show Peter, Benjamin, and some of his sisters as fully grown bunnies. Despite their existence, the public will always remember the first Peter Rabbit story the most.
Germans Love David Hasselhoff: Peter Rabbit is a lot more popular in the United States then the United Kingdom which is the native country for the character. Heck most of the animated adaptations of the book were actually from American animation companies over the past couple of decades. While only two were made in Britian which was the native country of the character.
I Am Not Shazam: Most people (Especially American readers) would refer to the Peter Rabbit story and the character himself as "Peter Cottontail". This can get more confusing around the spring season and when it's close to Easter where most people when they hear the song "Here Comes Peter Cottontail" they thought it was about Peter Rabbit when it's actually about the titular character from a Rankin Bass Easter Special of the same name.
Tear Jerker: In the HBO Family series "Storybook Musicals" which adapted the Peter Rabbit story. Features one song sang only by Peter when he's all alone and realizes that he can't find his way back home while trapped in Mr Mcgregor's garden.