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.
Able's a video game character, as he's constantly bored unless killing something, can produce an infinite quantity of weapons, and respawns on death.
Clef (the creator) sees Clef (the character) and Kondraki as having an inimical view of eachother. However, many Foundation tales written by others depict Clef and Kondraki to be more like Vitriolic Best Buds (without the "best" part, at least). This is horribly subverted in Incident 239-B when Kondraki snaps Clef's neck out of pure rage.
SCP-173 isn't a homicidal statue which loses the ability to move when a human is looking at it. Rather, it's a piece of art that wants people to look at it, and so is content to stay still when someone is looking at it. If someone is present but no one is looking at it, it tries to force that person to look at it, but since it doesn't know its own strength it ends up snapping their necks when it tries. A bit weakened by the fact it will do this to someone looking straight at it when they blink (which would not be helped by moving someone's head around). And due to this page, appropriately titled "crunch". Of course, that is not canon and you can ignore that story.
The Foundation as a whole. The Weirdness Cops who sometimes have to do unpleasant things in the name of preserving all of humanity, but try to do so with a minimum loss of human life and while retaining what morals they can? Or callous Science Nazis, out to control every item of power they can as much for the sociopathic thrill as anything else, willing to order the cold-blooded slaughter of entire towns on a whim? Articles are written from both viewpoints and a number in between, and there's plenty of arguing over which is the "correct" one.
The GOC. Paranoid and trigger-happy soldiers who destroy what they can't understand, or the real last line of defence who will do things the Foundation can't or won't? (The GOC-focused stories also suggest that the "destroy everything" strategy may not actually be true, and is just how the Foundation see them.)
The Church of the Broken God: Are they a group of madmen trying to bring about the apocalypse, or are they just a standard religion that the Foundation have decided to pick on, and will fight back with the fervor of any other group who are persecuted in the same way?
And the biggest one of all - what if they're right, and the world is screwed up because God is lying broken into pieces and cannot intervene? And the Foundation has responded by, among pother things, continually droning God?
SCP-607. Is he a suicidal cat who wants to die and is not aware of his effects of bonding with humans, or is he aware of them and intentionally trying to kill off humans?
SCP-085, "Cassy": Moeblob who has her every wish tended to by the Foundation or a good-natured entity stuck in a horrifyingly lonely and alienating existence?
Are We Cool Yet?: People tend to either despise them as jerkish hipster warlocks who plaster their inane catchphrase on everything or love them as a new and fresh Group of Interest with a disorganized, guerrilla art mentality that allows for plenty of possibility. The tendency of some authors to needlessly shoehorn in an AWCY reference into random articles hasn't helped.
SCP-105, "Iris": Once beloved by contributors, now is considered a badly-written Mary Sue and the article was even under threat of deletion due to low ratings. Remained popular enough to evade that fate though instead getting a rewrite to downplay her "ability".
Everything stated about SCP-105 applies to SCP-239. However, she also has one tale that's really well-received.
SCP-231 is considered by some to be a well-written tragic article about just how cruel the Foundation in the name of the greater good can be and by others to be a poorly written sob-story that uses implied rape for shock value and explains too little for it to even be effective.
The SCP Foundation Heritage Collection, a "Hall of Fame" for older articles considered important to the site's history and culture. Some think it's a good way to preserve the "classics" and recognize their impact on the site, while others think it shows favoritism or will encourage people to emulate the old writing style. It doesn't help that some of the Base Breaker SCP's listed above are in that collection.
SCP-953 is a Korean Kumiho who makes a habit of devouring human livers. Before she was captured, the Kumiho would go on violent sprees to rip the livers from their owners and proved herself to be far more than just a predator. The Kumiho would proceed to draw out her victim's agony and viciously torture them to death, relishing in their pain. When she escapes, the Kumiho will inevitably begin her murders anew, including an attack on a furry convention that left many dead. She also murdered an agent and performed sexually indecent acts on the corpse. Her worst crime, however, was telepathically forcing a mother to murder and cook her own child.
SCP-993, AKA Bobble The Clown functions as The Corrupter to children. Using the power of television, Bobble would out viewers above the age of 10 into a trance while the children were shown graphic acts of Bobble committing murder and other evil acts. Many of the children would grow up to become serial killers themselves. Bobble himself describes himself reaching into the heads of children and happily twisting them. By his own admission, Bobble has been creating monsters for 'quite some time' and has even given his child victims instruction on how to release monsters from the SCP foundation that could cause the end of humanity. When interviewed by a foundation doctor, Bobble revealed he has been creating monsters for 'quite some time,' and that he has been tormenting humanity since the caveman days.
SCP-1790 is a being that can respawn whenever it dies by possessing a human infant. Seemingly human, it uses each lifespan to found a powerful cult and eventually institutes ritualized mass murder and human sacrifice. When it is not stopped, SCP 1790 will direct its followers on large-scale mass murder campaigns against the general population before abandoning the cult and moving on to start a new one.
Some people like to ship 682 with 999. This one could work in theory, considering the way they interacted, but it also caused 682 to unleash a wave of liquid happiness that killed a huge amount of people and while 999 wants to see 682 again, 682 responded to the idea of them meeting again with:
“That feculent little snot wad can [DATA EXPUNGED] and die."
It's not as well known as Iris/Able, but there is a couple of pieces of fan art of 106 and 811. However, since this is 106 we're talking about, the consent of 811 in the pics is... questionable at best.
Another 106 shipping, from the discussion on SCP-352:
Gears: Just had the worst idea ever… this and 106 out loose in the same area…lordy… Also…i forgot about the story for her, but i remember now, and will hopefully get a good idea for it soon.
Tom Serveaux: They catch each other's eyes from across the hall and fall in love. Then 106 invites 352 out on a romantic, candle-lit, infanticide spree. Then they get married and have lots and lots of decrepit, predatory babies. A heart-warming romance, indeed.
Crazy Awesome: Many of the better-known researchers swing back and forth between this and just plain crazy. Some of the more notable moments:
Dr. Bright once attempted to disprove 343's existence, to 343.
Despite not being as famous as Able, Iris or the old man, SCP-811 is one of the highest rated humanoid SCPs on the site. She's also quite popular in fan art.
SCP-____-J. It's a very short article (which is the point), yet it's the third highest rated page on the entire wiki.
SCP-040 and SCP-134 are both quite popular amongst fanart creators (despite not being over 100 in their ratings).
SCP-131-A and -B as well.
Draco in Leather Pants: 682, of all things, gets this frequently, from those who believes that it only wants to kill everything because everything wants to kill it. Those who believe this rarely mention two incidents in which 682 killed completely innocent children who had been left in its cell. They also rarely consider that the Foundation must have a reason for wanting to kill it, as they don't terminate SCPs very often.
Fandom Berserk Button: It's "SCP". Not "SPC". If you make the typo, someone's bound to joke that it means "Shark Punching Center".
Hilarious in Hindsight: One of the snacks SCP-261 produced was a Pepsi drink flavored with dragonfruit that the Foundation said PepsiCo did not produce. In 2012, the real PepsiCo did produce a dragonfruit flavored Pepsi called Pepsi X to promote 'The X Factor''.
Hype Backlash: 682 and Able are almost reviled by some members for being so ridiculously popular. It doesn't help that they're the leading causes of Broken Base on the site, either.
Iron Woobie: SCP-053, a little girl that induces homicidal hatred in anyone over the age of 3 around her. Considering she'll never be able to interact with anyone, even her own parents, without being violently attacked, it's hard not to feel sorry for her. Despite that, she always seems to be cheerful and have a the same bright-eyed disposition any child would have.
SCP-811. Despite the fact that she was a normal human girl who was transformed into a swamp monster and lived her entire life in a swamp and now a glass cylinder, she doesn't seem that upset by it. Although SCP-978 revealed that she wants to be human again.
Professor Crow feels this way about SCP-040 in this tale, saying that, beneath all her biology-warping power and energy, she's just a lonely little girl that wants some friends.
SCP-1156, despite being taken away from his family, has an an upbeat attitude and seems pretty cool with working for the foundation.
Deconstructed with SCP-056, a being that changes its form to always be better than everyone/everything else present — among dogs, it appears as a bigger/fancier/better-groomed dog; given an IQ test, it scores 30 points higher than the smartest person in the room; in a gym, it can always lift 30 lbs more than the strongest person in the room; with no one present, it'll focus on the surveillance camera and turn into a better one. Anyone talking to it for too long usually ends up violently hating it. Its incredible narcissism doesn't help.
It's gotten to the point that the Foundation won't use it against SCP-682 for fear of there now being an even stronger 682 roaming the world, and it's been in the termination of one of the aforementioned Marty Stu characters.
Played straight with SCPs such as 316-D, who are blatant self inserts. They used to be promptly terminated in amusing reports such as this, but nowadays they're just deleted.
Memetic Badass: Dr. Clef is immune to seduction because his crotch is a hand, and that hand holds a gun.
Cassy. For bonus point, her appearance changed to match the art style of the picture she's in.
Despite how creepy she is, you can't deny that 053 looks adorable.
SCP-999, an adorable blob that loves everybody and survives off of candy.
Memetic Sex God: Downplayed with SCP-105; she's often portrayed as desired by other characters (such as Parody Sues 'claiming' her as a girlfriend) and implied to be attractive, and nearly every joke involving an in-universe female will usually use "Iris". (In her actual article, very limited information on her physical appearance is given, and her SCP ability/anomaly is totally unrelated.)
This trope is actually somewhat deconstructed with SCP-166, a teenage girl who is desired by every man who sees her, which causes her severe distress.
Invoked with 1459, a machine whose sole purpose is for its user to come up with cruel and twisted ways to kill a puppy, with the only reward being a cookie of a variety the user usually hates. The machine even lampshades this at the end of each "game":
MST3K Mantra: Any contributor who asks the senior staff about some of the more questionable aspects of the setting's backstory - like where the Foundation keeps getting like Class D personnel (even in the United States, there are only so many people serving life sentences/on death row), or where do they keep getting the billions of dollars that would logically be necessary to keep everything running - will be greeting with this. If the contributor catches them on a good day, he or she may get a Hand Wave explanation, but even then, they'll urge the contributor not to overthink it too much.
The bit about skeletons coming to life and hanging themselves from the otherwise excellently creepy 097.
166, which sounds like the premise of some awful hentai.
The chilling tone of SCP-1981 becomes less scary when you read the excerpts, which are so nonsensical that it's hard not to laugh. The fact that SCP-1981-1 looks like a hand flipping the bird doesn't help matters.
25% of casualties among soldiers sent to explore 835 were due to "aspiration of vomit" and suits were specially designed with equipment to counter any further deaths by said cause. They had to specially design diving suits so that when people vomited in them out of sheer disgust, they wouldn't drown in their own vomit and die.
Nightmare Fuel Station Attendant: Junior Researcher James, who's implied to be Dr. Bright's son. Two of his SCP's , SCP-789-J and SCP-078-J, which are funny if not childish. Then we have SCP-682-J, which are his drawings of SCP-682 and his versions of its description. One of the picture is SCP-682 eating a researcher.
Humorous "Added notes" regarding why the Doctors are no longer able/allowed to do so-and-so or a humorous event happening (often with commentary along the lines of "Seriously, what the hell, people?") can lighten up otherwise dark articles. Note that, humorous addenda are increasingly frowned upon, precisely because of this trope.
Reading the entry for a genuinely frightening SCP can have its impact taken away when you move on to an indestructible pizza box.
While we're on the topic of SCP-173 the little copyright notice on the bottom of the page can really kill the willing supsension of disbelief.
A few come from the 99Rooms, and so seem less scary when you know what they really are.
The first question on the FAQ? "Is this all real?" The answer? "No. It is just a collection of stories." The creepiness is kind of lost when you read this. Then again, it was a necessary measure when the SCP Foundation wiki admins actually started getting people contacting them asking how to join the Foundation.
SCP-198. You'll be picking up cups very gingerly for the next week or so.
SCP-096. Any photograph you view could contain even a single pixel of it, and you don't even have to be consciously aware that you saw it - at that point, it'll hunt you down and end you.
SCP-650, though not apparently dangerous, literally does nothing but teleport right behind you as soon as you turn around to scare you. You'll always be waiting to see it whenever you turn to leave a room...
SCP-1974, parasites that are indistinguishable from food (unless sprayed with insecticide) and, once they get into your body, intestine anatomy (unless biopsied, but how would you know what to look for?).
Speaking of Moe Anthropomorphism, some of other SCPs also got same treatment. Some are mild, like Iris and 053 who simply got draw in cute style, or 191 who usually got her the missing mouth back and has less severe wound. The more bizarre case would be 682 as Cute Monster Girl.
So Bad, It's Good: Some of the Decommissioned SCP items are hilarious in how absurd they are, such SCP-106-D, a perpetually smiling woman who explodes with the force of a 20kt nuke when she jabs her finger into someones naval, or SCP-269-D, a giant moose man◊.
One Bad Mother, written by Dr. Mann. Combining Mr. Seahorse with Herr Chirurg, two-into-one body grafting and one of the most mentally depraved individuals the Foundation boasts was sure to lead to a lot of vomiting. It's played for laughs, though, and non-canon because no way in hell would the Foundation allow anyone (specifically two men) to start an active relationship with an SCP like Herr Chirurg, let alone bear their child. But still...
Woobie Species: SCP-1342-3. They're aliens from far future which were almost destroyed by humans, and the rest won't last long. Unlike Bigfoot, they didn't do anything to deserve it. They have only one chance to save themselves by destroying Earth in the present, so our successors won't have a chance to attack them. They decide against it and instead send warning to the humans in the hope that they can change themselves. No threat, just a friendly warning.