Harry Potter and The Philosopher's Stone/YMMV

• Alternative Character Interpretation: Pretty much everyone, if you're re-reading after having finished the series. Particularly Snape, Dumbledore, Scabbers, and Aunt Petunia.
• Non Sequitur Scene: The school song. No, not the Sorting Hat's song—the one that goes "Hogwarts, Hogwarts, Hoggy Warty Hogwarts." It is sung at the end of the beginning-of-term feast, but only in this book. It shows up very briefly in the fourth movie, with a more substantial inclusion in this Deleted Scene from the same, but it's never mentioned again in the books. According to Word of God, Dumbledore decides whether or not to have the school sing it based on whether he's in the mood.
• First Installment Wins: This is probably more well known than the rest of the series.
• Fridge Horror: When the first movie came out, there was a slew of merchandising, including a plushie of Ron's pet rat Scabbers. Who, two books/movies later, is revealed a disguised Death Eater who was responsible for getting one of his best friends (Harry's dad) killed by Voldemort and framing another (Sirius Black) for the crime. I'm sure every child who bought one could empathize with Ron.
  • The best bit of this is that Harry Potter the book was already out and the spoilered bit had been revealed. One can't help but wonder how well that toy sold.
• Funny Aneurysm Moment: The whole book is this after you read the whole series.
  • One moment that could be this or (even more) Hilarious in Hindsight is the passage in the Christmas chapter describing the Weasley Twins enchanting snowballs to bounce off the back of Professor Quirell's turban after you've read the end of the book and discovered what he's keeping under there.
  • Another passage involves Hagrid forbidding Harry to buy a solid-gold cauldron. Imagine if Harry did buy that kind of cauldron, y'know, for Potions class...
• Launcher of a Thousand Ships: And then some.
• It Gets Better: Notably, It takes about a third of the novel before Harry gets to Hogwarts. And quite a few children readers were turned off by the first few chapters for being too slow-paced; not to mention most of Rowling's dry satire on middle-class insecurities flying straight over their heads.
• Narm: or Narm Charm- Harry's rousing speech about not letting Snape get the Stone is awesome... but gets inherently narmy when he asks "d'you think Voldemort will leave you and your families alone if Gryffindor wins the House Cup?".
• Ship-to-Ship Combat: Probably few people realized just how big and vicious of a battle this book would begin among its fans, most prominently among Harry/Hermione and Ron/Hermione shippers.