- Broken Base: While the role of Snoopy is a fun, show-stealing one, and Roger Bart won a Tony for the role in the 1999 revival, some fans of the animated Peanuts specials don't care for the fact that his thoughts are verbalized (and sung) out loud, much preferring the Speechless/Silent Bob portrayal of Snoopy they grew up with on TV.
- Cant Un Hear It: Once you've heard "Schroeder", try listening to a performance of the Moonlight Sonata without imagining Lucy singing "Do ya know something, Schroeder?". Or after hearing "Glee Club Rehearsal," try listening to "Home on the Range" without Lucy interjecting "Give me my pencil!" in your mind.
- Early Installment Weirdness: Because the show was written fairly early in the comic strip's nearly 50-year run, it contains a little of this. The song "Little Known Facts" reflects the ditzy tendencies that Lucy had in the '50s and early '60s comics, which by the '70s were mostly phased out of her character. The original 1967 version of the show also stands out with its inclusion of Patty as a major character, though the Animated Adaptation and 1999 revival script both replace her with Sally.
- Funny Moments: The whole song "The Book Report", as Lucy, Schroeder, Linus, and Charlie Brown go through the travails of being assigned to do a book report on Peter Rabbit. Lucy pads her word count, Schroeder dives completely off-topic into a report that is mostly about Robin Hood, Charlie Brown endlessly procrastinates, and Linus reads between the lines on all sorts of deeper meanings in the book.
- Nightmare Fuel: In the Animated Adaptation, before "Suppertime," we actually see Snoopy's Imagine Spot of himself starving to death and Charlie Brown finding only his skeleton. It's brief and Played for Laughs, but still, it's a beloved cartoon character reduced to a skeleton onscreen!
- Tough Act to Follow:
- The show loomed large over composer Clark Gesner's career and he never did anything near as successful afterwards. He even had the dubious distinction of a Broadway musical that closed after one performance (The Utter Glory of Morrissey Hall).
- The follow-up, Snoopy! The Musical, was written by a different team and is largely considered inferior, though it still gets performed by school and community troupes.
YMMV / You're a Good Man, Charlie Brown