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.
Fanon: Ask the fan base and you'll find that Abby was unconscious for three days, Henry meant for JD to survive locked up in the jail cell and Henry deliberately gave his middle initial as "W" on the wedding invitations to stand for "Wakefield" (his middle name is established as "James" in episode 13), despite this last one being a production error.
Idiot Subplot: The bag of money that the groomsmen find and their efforts to keep it result in a nervous Booth being sent into the woods in the middle of the night to bury the money and carrying a gun he's clearly unfamiliar with. For good measure, Malcolm follows him and surprises him. Booth shoots himself in the leg out of fright and dies. No one in this sub-plot has any intelligence!
To top it all off Henry planted the money there for them to find it just to see what insanity would ensue amongst each other, as he was going to kill them all anyway.
Narm: This season contains comedy deaths, after comedy deaths, after comedy deaths.
Shane is just written as so unrealistically mean, especially in the second episode, that it is hard not to laugh at his lines.
Shane: "Boohoo, John Wakefield killed my mommy! Get over it! Now Get out, I gotta pee!"
Madison's scenes where she is supposed to be ominous and creepy would have worked if the actress was a few years younger, but instead she just ended up looking... a little silly.
The first third of the show before the murders are discovered contains an absurdly high number of Cat Scares, especially episode one.
Nightmare Fuel: What turns out to be the reason all of it happens? Henry killing everyone because of a promise Abby made when they were kids? And then trying to hold her to it?Definite nightmare fuel for some people.
One-Scene Wonder: Uncle Marty, despite getting killed off in the very first episode, is frequently a fan favorite.
The Scrappy: Madison and her mother Shea. Incredibly, they both live because Executive Meddling stated that the writers couldn't kill a child or every member of her family.
Shocking Swerve: Kelly's eyes being dyed red in the third episode proves to be just a distraction for the viewers and doesn't actually have any impact on the story at all, even though it was supposed to implicate Kelly's tattoo artist boyfriend Shane.
Along with all the scenes of Madison and the fortune teller giving prophecies of supernatural doom.
Tear Jerker: Sure, it's a murder mystery and there's enough death to go around, but you have to admit you hated the killer a little more when Cal and Chloe died.
JD is a genuine one. A mentally-troubled and bullied loner whose parents died in the back story, who everyone thinks is dangerous and who is blamed for all the murders. He is finally killed by his adoptive brother Henry and refuses to speak to protect Abby. Word of God says Henry murdered their parents too.
Kelly is another. Loses her mother in the 2001 murder spree, suffers abusive boyfriend Shane and sees John Wakefield alive. No one believes her, which is how he gets away with it for a long time. She is hanged by him before anyone realises she wasn't mad.
Trish is one as well. Not only does she watch her dad die horribly in front of her, but in the end, she's murdered by the one man she loved the most and trusted with her life.