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.
YMMV: Saved by the Bell
Adaptation Displacement: Good Morning, Miss Bliss isn't nearly as well known as Saved by the Bell; it probably doesn't help that the former's episodes were folded into the latter's syndicated rerun package and presented as "the early years" of Zack, Screech, et.al., so that its origins as a standalone series were obscured.
A popular alternate take on Zack Morris is basically that he's a sociopath who treats the rest of the characters as pawns for his schemes and will go to any lengths to manipulate them into doing his bidding. The other theory is that Zack is a living god who constructed the entire world of Bayside solely to stroke his own ego and twist mortals to his whims. After all, within the show Zack can stop time at will, and in several instances he actually messes with people while they're time-stopped. Adding on to this theory, DC Comics and Superman fans could suggest that Zack might be Mr. Mxyzptlk.
There's also the one about Jessie Spano being a man. Whether A.C. Slater is aware of this is kept vague, but the general consensus seems to be that he'd not mind one bit.
Cracked have jokingly theorised that Mr. Belding is obsessed with Zack. They also posted articles about Zack bring a sociopath and the series wide interpretation it was only Zack's dream.
Anvilicious: No aesop is subtle. Especially involving ducks, you bastards. Well, this was a show filmed during the 1980s and 1990s after all.
Awesome Music / Ear Worm: The theme song. Just try to listen to it once without it getting stuck in your head.
Critical Dissonance: Critics absolutely hated Saved by the Bell, but by the end of its first season, it had become the highest-rated show on Saturday mornings, a position it would hold for the rest of its run.
Critical Research Failure: The episode where oil is found on school property has this in spades. As do most episodes involving any vaguely science-related class. Though it did get the planets right in the memorable acronym. For its era, at least.
Designated Villain: Johnny Dakota. The popular handsome teen star went to Bayside to shoot an anti-drug commercial. He was nothing but nice to everyone he met, bailed Zack out of trouble and invited the whole gang to a party at his apartment. Johnny turned out to be a pot smoker and invited the gang to join in on the fun, they enacted Disproportionate Retribution on him and ratted on him, got him fired from the anti-drug ad and shunned him. All because he wanted to make some new friends.
Ensemble Darkhorse: Zack in Good Morning, Miss Bliss and Kelly and Screech in the Saved by the Bell proper.
Family-Unfriendly Aesop: In one episode, Zack, Slater and Lisa get drunk at a party and then try to drive home. Zack crashes the car. They all scramble to fix everything and repeatedly lie to try to avoid trouble. Of course, they get found out, but only after their cover story gets so overly complicated and full of conflicting details. In other words, stick to the same lie or else you'll get caught for what you did wrong.
"Funny Aneurysm" Moment: It's hard to look at the episode about the oil on the school property without thinking about what happened in the Gulf of Mexico.
Lisa's response when Kelly says that she always wanted to be a princess: "Well, if anything ever happens to Princess Di..."
In "Rockumentary", we find out that it's Screech who goes to the tabloids with scandalous gossip about everyone. Dustin Diamond, Screech's actor, would write a scathing tell all book years later.
Guilty Pleasure: Jessie's caffeine pill-induced freakout is known to be re-watched over and over for its narm.
Harsher in Hindsight: Screech's entire characterization of being The Friend Nobody Likes. In real life, Dustin Diamond is outright hostile to his former castmates. Though Diamond has claimed that the tell all book Behind the Bell was ghost-written by an author who wildly exaggerated many of the things he said.
Zack and Slater. They got their own video, which naturally didn't neglect to include scenes related to the George Michael concert they were going to go to or the bits involving ballet. With the amount of drag and homoerotic and gay subtext, this show certainly has its queer edge.
This line from "Screech's Woman" shortly after Slater recognizes Screech's date as Zack in drag:
Slater:Morris??? (looks down) Nice legs.
Jessie stares crying at a recently married Kelly for just a little bit longer than strictly necessary.
Hollywood Homely: All of the "nerd" girls, most notably Tori Spelling and Louise (a.k.a. the Queen of the Nerds). For the latter, her actress was basically just given huge goggle-like glasses and had her hair mussed to make her look nerdier.
Informed Attractiveness: Kelly is regarded as the prettiest girl in school and amongst the gang, while Tiffani-Amber Thiessen is gorgeous, she isn't anymore beautiful than Elizabeth Berkeley, Lark Voorhies, or any other girl that appeared on the show.
Launcher of a Thousand Ships: Zack. It helps that the show at one point or another ship teased him with all the major female characters. And we're not even mentioning all the Ho Yay with Slater and Screech.
Marty Stu: Let's face it, Zack Morris gets unbelievably high SAT scores with a fictional Ivy League college pining for him, despite him having a billion drop-out worthy things on his record and never studying a day in his life, gets a new girl every other episode, (which he promptly pushes outside of the universe into a vast pit of darkness that is discontinuity), is one of the most popular guys in school, stops time, plays with his acquaintances like puppets on strings and suffers no actual repercussions for it. This has gotten to the point where some people (including Cracked) theorized that Zack is ether a very Manipulative Bastard, God or both.
Mary Sue: Tori appeared to be one, based on the fact that the show tried to beat us over the head with the idea that she was a match for Zack's wit. On her very first day of school, she waltzes in and manages to shut Zack up (yes, Zack, the wittiest person in the school) with a quick one-liner every single time he opens his mouth. Meanwhile, the uber-popular Lisa literally begs Tori to be her buddy, as though Kelly and Jessie didn't exist (somewhat justified, as they didn't appear in the same episodes as Tori). And Slater eventually develops a crush on her, though she's portrayed as being too good for him. Not to mention the fact that the characters keep gushing about how awesome she supposedly is. Even Screech, who's normally devoted to Lisa to the point where he's a Stalker with a Crush, just suddenly abandons his Lisa obsession and falls insanely in love with Tori.
It was also deliberately invoked by Elizabeth Berkley, who played Jessie, when she appeared on Dancing with the Stars. Before she and her partner Val performed their jive, they recreated the whole scene, including Val coming into the window dressed in a letterman jacket, Elizabeth insisting she needed her "jive pills," and, of course, the singing.
Narm: Jessie's caffeine pill addiction (thisTeens React episode on the show is visible proof of this kind of Audience Reaction) and the Elvis episode. In the case of the latter, it was probably intentional.
One True Threesome: In-universe example. In the episode where Screech falls in love with Tori, who is dating Zack, Tori ends up having to pretend to be interested in Screech to win a bet with Zack, but asks Screech to allow her to continue seeing Zack at the same time. Screech responds "Ahhh, an open relationship! I can dig it! I'm hip!"
Zack initially is a Shipper on Deck for Slater, Jessie, and Jennifer (Slater's old girlfriend who moves to Bayside) to become this trope, until Slater states that he intends to pick one, and Zack decides he wants to date Jennifer himself.
Replacement Scrappy: Tori. She wasn't very well received, as fans who saw those episodes kept wondering "where are Kelly and Jessie?" On top of her being a hastily devised replacement character, the blatant attempts to shill her as a character who was able to smugly outwit Zack, triumphantly put Slater in his place, have the uber-popular Lisa literally begging her for friendship, and magically attract Screech away from his Lisa obsession made her come across as a Mary Sue.
It should be noted that the only reason for the introduction of Tori is that at the last minute, NBC ordered more episodes to be filmed for the final season, just as the series was wrapping up and all the cast's contracts had expired. Elizabeth Berkley and Tiffani Amber-Thiessen (who played Jessie Spano and Kelly Kapowski, respectively) simply wanted to move on and refused to re-sign. As a result, Tori was hastily created to fill in the roles left by the absence of the two aforementioned characters, and especially in the case of Kelly's absence, serve as a love interest for Zack.
The Tori episodes were filmed after the series finale and the made-for-TV movie that were supposed to wrap up the plot of the series, but were inserted into the middle of the season, as their storylines take place at the high school, in the usual canon of the series. This has lead to a series of gigantic plot holes that fans call the "Tori Paradox": Out of nowhere, Jessie and Kelly unexplainably disappear; Tori starts as a new student at the school and instantly befriends the main cast, who are carrying on as if Jessie and Kelly never existed; She is established as some kind of hybrid of Jessie and Kelly, thus she is beautiful and athletic while being smart, snarky and feminist; Zack begins a romantic relationship with her with absolutely no mention of his relationship with Kelly and showing no remorse for the fact that he is potentially cheating on her with Tori; Zack and Tori break up and all of a sudden, she is gone with no explanation of her fate; Jessie and Kelly reappear and everything reverts back to how it was before Tori appeared; Zack and Kelly get married and everyone graduates with no mention of Tori whatsoever, as if she was never there in the first place. This can also be seen as an example of What Happened to the Mouse?.
Some fans have tried to rationalize the Tori Paradox by speculating that the Tori episodes take place in an entirely Alternate Universe. This explains why Kelly and Jessie are totally absent with no mention of their existence; because they don't exist in the Toriverse, which explains why Zack acts as if his relationship with Tori is his first serious romance. It is in that universe. It also explains why Lisa initially doesn't seem as close to Zack, Screech, and Slater as she is in the regular episodes; in the Toriverse, it's their mutual friendships with Tori that brings them all together. Thus, the Toriverse is it's own, alternate continuity, while the "Kelly and Jessie" episodes take place in the regular continuity.
It has been noted that Tori both resembles and shares personality traits (most notably her strong feminist attitude) with singer/pianist Tori Amos, who had come to fame around the time the "Tori" episodes were filmed and aired. However, no evidence exists that the character is based off the singer, and thus any similarities between the two are simply a hilarious coincidence.
Seinfeld Is Unfunny: A lot of the jokes, while dated by now due to being reused in several sitcoms since then, were much fresher when the show first premiered. Saved by the Bell was also the first sitcom to feature "tweens" as the core demographic, before the word "tween" even existed, and was also the first of these sitcoms to gain a significant Periphery Demographic, a phenomenon which happens regularly nowadays. iCarly, Lizzie McGuire, Hannah Montana, Drake & Josh, and other similar shows all owe a debt of gratitude to Saved by the Bell for starting it all.
To make things even more amusing, several of the above-mentioned shows that owe their existence to Saved by the Bell also feature the same school hallway set from Bayside High. If you look closely at the hallway scenes of iCarly or That's So Raven, you can actually notice it's the same layout, because the exact same set that was used for Bayside has been reused for several of these later sitcoms, making the set itself a legacy that Saved by the Bell bequeathed to later tween sitcoms.
They Wasted a Perfectly Good Plot: Zack and Lisa hooking up and making quite a nice couple and having Screech move on to Jessie, two potentially interesting bits of plot which was completely ignored afterwards. In the episode with Lisa's secret admirer, she meets a person she thinks is Zack at a costume party and announces she loves him. When it turns out to be Screech, the entire plot is dropped forever.
Since that last part with the costume party takes place during the bizarre Tori Era, an era that seemed to become Canon Discontinuity as soon as it was over, we can assume that that event was sucked out of continuity and vanished into a time warp like most of the other events that happened during the Tori arc.
Two episodes focused on Screech finally getting a girlfriend, the shy, nerdy Violet Anne Bickerstaff, played by Tori Spelling. Despite being very adorable and having lots of chemistry with Screech, she is never seen again and he goes back to being a loser who can't get a date.