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.
Adaptation Expansion: The show is based off a Stephen King mystery novel called "The Colorado Kid." Vince Teagues is a reporter, and the Colorado Kid is a mysterious appearing of a dead body several years before. That's about where the similarities end. Almost In Name Only.
Fan Nickname: "Fraudrey" for the second Audrey Parker who showed up at the end of season 1.
Ironically, it turned out that Fraudrey was in fact the REAL Audrey Parker and the first one is the fake!
Harsher in Hindsight: In-universe. Nathan's rage against Duke (with repeated references to his inability to feel) in "Harmony" feels even angrier after he reveals in "Sins of the Fathers" that he blames Duke for the return of his Trouble.
HSQ: Very high, especially from season three onwards.
Moral Event Horizon: Wade Crocker jumps into the family curse with both feet. He knifes a Troubled man to get his blood to activate the Crocker family curse, then murders Jordan whom he'd been attracted to.
Once William is revealed to be evil he does alot of bad things, but the worst one has to be activating a baby's Trouble that causes people to die whenever it cries, so he could force Audrey to create a new Trouble to cancel it out.
Mara wastes no time proving how evil she is in season 5, murdering two people over two episode for incredibly petty reasons.