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.
Base Breaker: Jeff The Killer seems to be one, for what seems to be that he's a less abstract and surreal character in his conception, and more of a rather basic horror movie character.
Cliché Storm: An interesting example - the Creepypasta Wiki even has a list of "Creepy Cliches".
Creepy Awesome: Quite a few monsters 'pasta authors dream up can turn into this.
Critical Research Failure: "There was no text asking me to switch out." from "Snow on Mt. Silver". The player had only Typhlosion left at that point since rest of the team got frostbitten to death, of course there would be no text for switch out!
Fridge Horror: These stories can sometimes be composed of this. In the case of Pokemon: Scary Black and Pokemon: Lost Silver, one must wonder who would be sadistic enough to make such hacks, and why they would distribute them on plastic cartridges rather than on the web.
Made even worse by the fact that the cartridges were apparently old enough to predate the technology required for them to be hacked to the extent that they were and put on a cartridge from someone's home. So either someone at Nintendo has an incredibly sick sense of humor, or the explanation is of a more... supernatural nature.
The story "Abandoned By Disney" has the narrator discovering, in a previously locked room in an abandoned resort, the corpses of the employees and the...thing that killed them. He runs and escapes with his life, but he makes no mention of having re-locked the door. Whatever was in that room, may have just escaped into the world at large.
The premises of some creepypastas may unsettle audiences until further detail of the pastas is given, as in "Mereana Mordegard Glesgorv" where the absurd and overly-dramatic detail that the viewers of the video gouged their eyes out THEN mailed them to Youtube's main office is given.
The Creepypasta Wiki has a section devoted to trollpastas and other poorly-written tales. WHO WAS PHONE?
The Epic Rap Battle between Dead Bart and Squidward's Suicide lightens the scare factor almost instantly.
This is par for the course in video game and lost episode pastas. Whatever the story does right, it doesn't change the fact that you're basically reading a Dark Fic of a silly, idealistic, and all around nonthreatening work like Pokémon, My Little Pony or Spongebob Squarepants. If, on the other hand, the source material is serious and cynical, then people are already expecting something dark, which is a problem since these pastas typically rely on Surprise Creepy. It's no coincidence that the majority of entries on the Trollpasta Wiki fall into these subgenres. Pastas about an original Show Within a Show tend to fare better, as they are not burdened with the reader's expectations of other stories.
"Abandoned by Disney" and, even moreso, its sequel "Room Zero", are this for anyone who's been to a Disney park. "Room Zero" is the most paranoia-inducing, between the "author's" descriptions of being followed and finding Mickey-Mouse silhouettes everywhere, the "corpse disposal" procedure, the gascots, the eldritch happenings on the waterslides, and the implication that Disney had an old woman murdered for talking about one of their darkest secrets. The crowning moment of Paranoia Fuel, however, has got to be the big reveal: there's a bomb shelter under Disneyworld, sealed off and filled with a park's worth of long dead patrons as well as...something, possibly the demonic force responsible for the events of the first story...right under everyone's feet. Even worse, it's implied that they're still haunting the park, and are not only responsible for the horrors in both stories but may be cursing the entire Disney corporation.
Jeff the Killer's origin story may qualify, as well. He may be insane and murderous, but remember: he's human, and if the story is any indication, he's just a kid. Think about it. All of that happened to a child.