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.
The music, visuals, and sounds that play during the Jack Attack can reach "do not play alone after sunset" levels.
The Church of A'zqr, the Eternal Bleeding Jackal Skull.
Porting Disaster: The PC version of 2011 somehow had less features than its console counterparts, despite most of those features being more than possible on a PC. Almost all of the games supported at least 3 players on PC; 2011 supports 4 players on consoles, but only 2 on PC due to the new question format with money-based-on-time-to-answer not working so well when everyone has to share a "controller." When a concerned player tweeted a request for further clarification as to why the PC version was limited to 2 players to YDJK's twitter account, this insult◊ was what he got in reply.
The DS version of 2011 doesn't include the "Wrong Answer of the Game" and the "Nocternal Admissions" Questions.
The Scrappy: Billy O' Brien in 2011. Even Cookie hates him and is happy if you pick the Wrong Answer of the Game in the last episode, which gives you Billy.
Buzz Lipmann is the Scrappy of the whole series, getting only one game and a Butt Monkey joke in The Ride.
Replacement Scrappy: The f in 2011 for the dead 4. To the point where many believe he killed 4.
Squick: The contents of Chocky's various breakfast cereals. (Pink and tarty milk, anyone?)
What Do You Mean, It Wasn't Made on Drugs?: The entire theme of Headrush's interface is, basically, the purest psychedelia of the 80s, complete with mostly black background, acid colors, distorted voices (that don't belong to the host most of the time), fast-moving grafitti slideshows/titles on the standby screen and really scary toy images for representing the players' avatars. Even the logo of this game looks precisely what you'd call surf-esque!