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.
Ending Fatigue: The bonus level Class of Spook'em High gives the game a legitimate ending in which you and your minions leaving the town by entering a bright light in the sky. Unlock all or most of the ghosts in the game, and the sequence seems to go on forever. Each ghost rises up, does a pose, and flies off. Did we mention there's a lot of ghosts in the game?
Fridge Horror: Sometimes you can glean a fair amount of disturbing background information from what kind of fetter a mundane object serves as. Some is more straightforward: the living room of the 'Calamityville' house, the one that was once inhabited by an old lady who poisoned her guests' tea, still contains a teaset that can serve as a 'murder' or 'violence' fetter - the same teaset she had used, still there. Then there's the one hospital bed that apparently a murder victim died on (or was perhaps even helped along by one of the staff?). And then there's the occasional couch or bed in the frat house, the mafia cruiser and the military base that serve as fetters for 'violence' and 'emotional'...
Nightmare Fuel: The intro cutscene can be...very unnerving. Also, even though you play as the ghosts, some are still simply creepy — not to mention some of the epitaphs.
Hilarious in Hindsight: Hailed as a Sims-beater. Two sequels later and this game sunken into obscurity, well...yeah.
Tear Jerker: Realizing Lucky died due to a malfunctioning pinball table that she rested on because it was warm. Just...the kittens. Why the kittens?
Trial-and-Error Gameplay: Manipulation missions, period. In the "Spooky Hollow" mission, the only way to learn which powers can disrupt the summoning ritual is to try them all, even though location should give you some hint. "The Blair Wisp Project" takes the cake, though, because three humans can easily wander away from each other, making it impossible to manipulate them all at once.