These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Crowning Moment of Heartwarming: Scooby and Velma's hug in "The Computer Walks Among Us." Scooby adores Velma, and he's the only member of the gang who never once doubted her innocence (she was accused of having her computer commit thefts at school and was subsequently suspended). Velma gets her face licked by Scooby almost about as much as Shaggy does.
"Funny Aneurysm" Moment: In "Scooby Dude" the gang busted a drug dealer. Freddie's voice actor Carl Steven would later become a drug addict and was found dead from a heroin overdose.
She Is All Grown Up: Wow! Fred was a dork with a crew-cut! Shaggy was a cute kid before puberty smacked him! Scooby was a growing pup! Daphne is quite a fine wine, age-wise! And how did a tiny little girl like Velma grow up and fill out...a lot?
Vindicated by History: This show was lambasted back in its day for its repetitive animation (especially seen in its dance montages), formulaic nature and for contributing to the trend of "babyfication"note making kid versions of popular '60s/'70s and earlier shows that was going on for cartoon franchises in the 80s. Nowadays it's fondly remembered for being the first Scooby-Doo series to not take itself seriously by frequently lampshading and parodying the cliches and tropes of the original formula, paving the way for later incarnations.