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.
Cargo Ship: The Serpent's Snake and Biffy's phone.
Ensemble Darkhorse: Giuseppe, "Sleeping Ugly," Robin, Dick and most surprisingly of all the background characters who are quite literally the background!
"Funny Aneurysm" Moment: Following the discovery that Lynch is Radcircles... all the moments where he acted like some kind of slightly awkward Genius Ditz with his comments, are suddenly much less funny...
Not to mention the overall admiration he showed for Lee from near the end of season 1 onwards...
Genius Bonus: Lee has a tatto of a trigram on his left arm. This particular trigram is "fire", or in the original Chinese, Li.
Hilarious in Hindsight: Season 1's Episode 4 had a picture of Lee picking his nose circulating around the school, courtesy of Jerk Ass Irwin. Come season 2, and Lee befriends (or re-befriends) a girl hypnotized into constantly picking her nose. Then, come season 3; she becomes a recurring character halfway through, and competes with Tina over Lee's affection.
Ho Yay: Quite a bit, between Lee and Biff, and Lee and Holger. As of "Misadventures in Babysitting", Cam and Holger have made it to the list.
Mondegreen: Hearing Holger as "Helga" or "Holgar", "Webber" as "Vebber" or "Lemmon", Ping as "Puny", Camillio as "Cameron", Tina as "Tiba" Carb as "Carvey", Raven as "Raisen" and Art as "R." Some of these don't even make sense.
The Scrappy: Brad Von Chilstein. Hard to not to see why, literally none of the fans like him because of him getting in the way of Lee and Tina's romance (but really that was the point of why he's a character) and his ego. Not to mention his Wrong Genre Savvy attitude gets really annoying after a while.
Brandy, Kimmie, some people don't like the Glamazons.
Barrage, just because of how tyrannical he can be.
Mrs. Ping, does anyone really need to explain why? To her credit, she can be nice, but her moments of anger outweigh by far those moments of being nice.
In fact, many of this show's Scrappies have had episodes in which there was an attempt at rescuing them from the Scrappy heap: Lee's mother in "Clogspiracy"; Brandy trying to bond with Lee in a Season 2 episode, showing that she's trying to get that relationship to work; Kimmie trying to rebuild her relationship with Biffy, even if she won't admit it...
Chaz. Just Chaz.
The appropriately named Dick Andrews.
Jenny Jerkins. She has become the female Brad because she is getting in the way of the romance between Lee and Tina.