YMMV / Happy Days

  • Base Breaker: Chachi-nated, or De-Chachi-nated? Nick at Nite even made a marathon out of this premise, and viewers got to vote.
  • Crowning Moment of Funny: Fonzie's been using "Sit on It!" for years, to great reaction. When Marion of all people uses it on him, the reaction from the crowd and Fonzie himself was priceless.
  • Darker and Edgier: By the final season. Well, as D&E as you could be with this show. More dramatic moments (among them an Attempted Rape of Joanie), the use of "hell" and "damn", and Fonzie showing more weakness.
  • Ear Worm: C'mon, sing it with me: "Sunday, Monday, Happy Days...".
    • The "Pumps Your Blood" song.
  • Ensemble Darkhorse:
    • Fonzie in the first two seasons, so much that he became a Breakout Character and was promoted to second billing, after Ron Howard.
    • Mork was only supposed to be a one-shot character and his episode All Just a Dream, but Robin Williams' performance was such a hit that the episode was revised to make the events real after all and gave him his own spinoff.
  • Hey, It's That Voice!: Apparently Ralph Malph ends up stuck in The Realm working for Dungeon Master. Who knew?
  • Replacement Scrappy: Roger.
  • The Scrappy: Roger.
    • Chachi was always The Chachi. He was popular with the girls, but retroactively, amongst older fans? Please.
  • Seasonal Rot: It started out as a very cool, low-key show, then became the ideal version of a standard sitcom with a Studio Audience. It'd started getting worse (the Trope-Named Shark-Jump) even before Richie left, but only got worse after that. Fonzie got a temporary full-time girlfriend for one season, and things got increasingly worse with gimmicks and nonsense until a thankfully fantastic final episode.