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.
YMMV: Corpse Party
Americans Hate Tingle: Ayumi took first place in the Japanese poll. As for the western audience, well... see below.
Breather Level: In Book of Shadows, the incredibly long "Shangri-La" and short but viciously difficult "Mire" are followed by "Tooth", a short, straightforward episode with only one, very obvious Wrong End and no real risk of succumbing to Darkening.
Massacre, which serves as Sachiko's theme is awesome for being equally mysterious and threatening, setting the mood for the finale.
Darkness-Induced Audience Apathy: The main criticism for Book of Shadows is that none of the characters were sympathetic or likable and that all of the gore and killing felt it lacked any good meaning or taste.
The OVA Totured Souls is beginning to get the same reaction, mostly because nearly everyone dies, and mostly in very gorey and meaningless ways that serve little purpose other than shock value. Especially the ending.
Designated Protagonist Syndrome: Although this is an Ensemble Cast game, Satoshi is the official protagonist. Problem is, many fans consider him to be a boring generic nice guy with no real defining traits, which means he's easily overshadowed by his classmates and even the secondary characters. Even worse, it's Ayumi and Yoshiki who actually get a lot more done - in one chapter, they both find and return the severed tongues to the ghost children and actually manage to get back home while Satoshi had spent the same amount of time trying to find a toilet for his sister. It's gotten to the point that some fans consider Ayumi and Yoshiki the main protagonists.
Fan Dumb: Although no one in the games are perfect - being trapped in a hellish school of murder tends to make people a lot less sane - some characters are hated by fans for very unfair reasons. Ayumi gets a lot of hate for 'friendzoning' Yoshiki and not sharing the fangirls adoration of him, even though she spends most of the game just trying to maintain hold over her sanity. Fans also hate Naomi for yelling at fan-favorite Seiko which leads to her death, even though Naomi was traumatized by a near-death experience before the argument and is very much aware of what she did was wrong.
Fan Nickname: X Seed's forum has taken to calling Tokiko Tsuji (one of the murdered ghost children) "Gurgles".
Fridge Brilliance: Out of all of the ghost children, why is Yuki Kanno the one to show Ayumi and Yoshiki what really happened? It makes sense that Tokiko Tsuji couldn't, since she's still unintelligible even after getting her tongue back since the top half of her head is missing, but why not Ryou Yoshizawa, who only lost his tongue? Because Yuki is the only one who saw the face of the real killer!
Fridge Horror: Plenty of in-universe moments as the plot is pieced together, but one of the biggest involves a splattered corpse used for a bit of dark humour early on... mainly, who it turns out to be.
This is essentially the niche appeal of the game. You're given enough detail to comprehend the situation, but the rest is left to a horrifying imagination.
Fridge Logic: If you die in Tenjin, the outside world completely forgets about your existence. However, Naho's blog instructions survive despite her dying in Tenjin.
This is eventually addressed in the Blood Drive chapter of Book of Shadows.
This game is also heavily commended for the amazing voice-acting that gives a disturbing level of realism to the script, whether this means sobs in terror or screams of anguish as they're being brutually murdered or just saw their friends die.
Ho Yay: Seiko likes to tease Naomi with this, along with baiting her about her crush on Satoshi. The splash images for their chapters love playing this up as well by posing the two girls in various embraces. The first promotional images for Book of Shadows follow the same motif. In the drama CD based on a Wrong End where Yoshiki ends up Buried Alive, Yoshiki has a hallucination where everyone is in love with him. Including Satoshi and Sakutarou. Including Kizami, who he never meets in-game(except as the "Anatomical Model" in the Science Room). In Extra Chapter 9, after accidentally breaking Sakutarou's glasses, Yoshiki has to walk him home. Sakutarou links arms with Yoshiki, who accuses him of feeling him up. It should also be noted that Satoshi and Yoshiki are on a First Name Basis, which is a bit unusual for teenage boys in Japan. In Chapter 4, Satoshi hears a conversation between Naomi and Seiko just before finding Naomi hanging in the toilet stall about a Noodle Incident where Yoshiki actually touched Satoshi's crotch.
Jerkass Woobie: Naomi, a snappish, petty girl who embodies some of the worst stereotypes of a Tsundere... and pays dearly for them.
The ghost children (you know, the ones who cut out your tongue and stab out your eye if they catch you and kill Mayu by ramming her repeatedly into a wall) become this once you find out how they died. It turns out they aren't so bad once they get their respective body parts back.
Sachiko, herself might count. She witnessed the principal killing her mother and was killed as a result (plus, the principal later went back and cut out her tongue). On her birthday! To keep her mother from getting lonely, she started killing children to send to her. Eventually, she went crazy and started killing because she enjoyed it.
The Scrappy: Ayumi, for being The Load for most of the game due to being possessed so often, which leads to the player having to tread very carefully or get a Wrong End. Even Yuka can keep it together more. For those who see her as such, she gets a very satisfying comeuppance after she kills Naomi for her paper scrap in one of the final Wrong Ends. Ayumi is also heavily disliked by the Fan Dumb for 'friendzoning' Yoshiki and being 'ungrateful' for his efforts at protecting her, and for liking Satoshi instead of him.
Yuka is not very popular because of her childish personality and the fact that she's in love with her brother. That, and the fact that the girl just can't pee in the damn corner when she needs to go instead of starting an epic quest for a toilet.
Trapped by Mountain Lions: One particularly ridiculous sub-plot was Satoshi's and Yuka's quest to find her a bathroom so she could go potty. This takes up far too much time, with some toilets having no stalls, others with big holes in the way, or the stalls are full of hanged girls, to the point that so much time and trouble would have been saved if she had just peed in a corner somewhere. They even pass an empty bucket several times!
Unfortunate Implications: In Corpse Party: Musume, the Wholesome Crossdresser Miyu Shinohara is basically tentacle raped to death. Beyond that, the focus on panty shots and rape (especially regarding underaged characters) is... unsettling.
That One Level: Surprisingly, the first chapter can be this. There is one wrong end that happens at the very end of the chapter that can only be avoided by reading a specific newspaper that the game specifically warn you NOT to read in a room the game warns you NOT to enter. Worse still, the ending itself has no logical connection with the newspaper at all, so there's nothing cluing you in where you went wrong. And on top of that, every other time the game warns you not to read something, you have to heed the advice to avoid a wrong ending.
Also, the chase sequence inside the infirmary is perhaps one of the most difficult in the game as it takes place in a small room with parts of the floor that gives in when approached, causing you to easily get cornered. It is the only such sequence where running into your assailant only chips away at your HP rather than cause an instant dead end, but still.
The Woobie: Yoshikazu. He might be a shambling, murderous horror now, but in life he was a kind teacher who loved children right up to the moment he died. Being cursed into regressing to a child-like state and being under the control of a murderous rage-spirit who forces you to obtain victims for her is a fate he most definitely did not deserve.