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.
Archive Panic: Once a thread is dead, it is deleted and the web address will lead to a 404 page. With the advent of websites archiving threads from most 4chan boards and, recently, the images posted in them, this trope can now come into play for the website.
Broken Base: Many things have happened throughout a website's history that have caused rifts between groups of users or even boards
/int/'s split opinion on /pol/. On one hand, a good portion of /int/'s userbase are also avid /pol/acks. On the other hand, there's also a very vocal section of /int/ that hates /pol/ even more than the rest of 4chan do, seeing them as edgy, cancerous fedora tippers who (either single-handedly or not) killed /int/'s original purpose and instead flooded the board with race issues. When moot wreaked havoc onto /pol/ in December 2014, many /int/ users feared a possible invasion.
Dumbass Has a Point: For years /pol/ would regularly flip-out over a vague rumor that moot would delete the board for some petty reason, to the point of being a running gag. In 2014 this actually happened, causing thousands of users to flee the site. Indeed, this seemed to happen fairly frequently with /pol/; despite spouting constant nonsense and arguing, the users often made correct guesses about how political events would play out, giving rise to the catchphrase "/pol/ is right again!".
Eternal September: Summer sees children on vacation, which leads to an influx of new users every year around that time. The problem is that this heavily impacts the quality of the site, and some "summerfags" stay afterwards. Then there's the group of people that believe "summer" doesn't exist, and that the boards were always terrible. The truth seems to be somewhere in between.
Reddit due to it being perceived as a cheap copy of 4chan. Any memes that Reddit starts using get instantly disowned by 4chan. This one is fairly one-sided, bordering on Unknown Rival; Redditors tend to look up to 4chan as an example of what Reddit should be.
Tumblr due to near irreconcilable values differences. Tumblr views 4chan as a site of obnoxious, insensitive dicks while 4chan views Tumblr as a bunch of whiny social justice warriors who can't take criticism.
Fountain of Memes: Many memes that were spread across the internet originated on 4chan themselves.
Within 4chan itself, certain boards can have a noticeable influence on the other boards. Examples include /b/, /sp/, /tv/, /fit/ and /v/.
Humans Are Bastards: 4Chan and Reddit are most notorious for their hateful vitriol, casual racism, sexism, and homophobia, an uncontrollable amount of cyberbullying, encouraging teenage suicide, and being seen as the nucleus of the most rotten aspects of internet and fan culture. The boards are treated with heavy scorn and disgust by those who do not frequent them. 4chan at least seems self-aware of it's reputation and engages in quite a bit of Self-Deprecation, but apparently prefers complete freedom with a higher than normal amount of assholes to a strictly controlled but nice site.
Jumping the Shark: Many users feel that the site has done this thanks to recent events. moot suddenly started unfairly enforcing rules he never bothered with before, brought in a bunch of new authoritarian mods, and deleted an entire board just for being involved in a protest. This is causing many users to flee 4chan for the newly-created 8chan, which has much looser but more effective mods and doesn't discriminate.
/tg/ is the only board that everyone seems to universally agree gets anything truly productive done. As the catchphrase goes "/tg/ gets shit done!".
Memetic Mutation: So many throughout the years, it needs its own page just to list a fraction of them.
Non-Indicative Title: /v/- Video Games. Roughly only half of the posts have anything to do with vidya.
The insult autism. It doesn't actually mean the person they're insulting has autism (though considering the sheer number of people who post on the site, it's entirely possibly due to sheer coincidence). It's just a generic insult put towards anyone that won't let something go in an argument. Or when they are obsessed with a certain subject. Or when they just like/think is funny something that the person making the insult doesn't. Really, it morphs into whatever the person saying it wants it to be.
One of Us: Given how deeply ingrained 4chan is in the internet and the fact that most 4channers are huge nerds, there's plenty of overlap with This Very Wiki.
Sacred Cow: Any work that manages to reach the community's insane standards is treated as this.
Yotsuba&!, for being 4chan's mascot. Asking for Rule 34 of her is an easy way to get quickly banned and have a lot of rage directed at you.
The Scrappy: You will get a lot of answers as to which board is the worst. These, however, are the most commonly accepted.
/v/ is viewed as this by the rest of 4chan due to acting idiotic at best, incomprehensible at worst. It's the only board other than /b/ that has zero real topic (ostensibly it's for video game discussion, but it's rare to see a thread not get derailed two seconds in). Even moot himself thinks it's stupid.
/pol/ has a similarly poor reputation due to being pretty much nothing but political bickering and fighting over who's ideals are better.
/mlp/ reigns supreme as the king of this trope. Everyone hates /mlp/ but paradoxally agree that it is essential, acting as a 'containment board' for the pony threads. /mlp/ just finds it hilarious.
/lit/, mainly because its constant musing of philosophy and argument in literature is seen by a lot of the site as insufferably pretentious.
/tv/, partially because they are in some ways the movie/television version of /lit/, partially because of the questionable off-topic content that is posted there, and lastly, because they create a lot of forced memes.
/b/ and, more recently, /s4s/, are probably the most hated boards by pretty much everyone on the site who doesn't go to /b/ or /s4s/ (and by a lot of people who do). This is probably why most people who use 4chan but not /b/ keep insisting that it does not represent the site as a whole. It doesn't help that non-users that know of 4chan have the image of the site being a simple extension of /b/ (gore, shock images, abundant pornography, hackers and rampant misogyny [though the last part does apply to /r9k/ and /v/]) thanks to /b/'s juggernaut status in the late '00s, leading outsiders to paint all 4chan users with a broad brush.
Moderators, known as "janitors", are universally despised amongst users for being seemingly Draconian on a site that's very noted for its free speech. The fact that they do it for free looks even sadder in the eyes of the userbase. Reception towards them has gotten so bad that they've been accused of single-handedly killing /sp/ culture. When it was revealed that Cadfael, a tripfag who was actually liked was one of /sp/'s janitor, public opinion soured on him instantly.