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.
Alternate Character Interpretation: 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 the above theory, DC Comics and Superman fans could suggest that Zack might be Mr. Mxyzptlk.
There's also the one about Jessie being a man. Whether 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 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 1980's and 1990's, after all.
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.
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.
Not to mention 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, but also Louise (aka the Queen of the Nerds), whose actress was basically just given huge goggle-like glasses and had her hair mussed to make her look nerdier.
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 Ivory-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, and...Good lord, we could go on for hours! (AKA Gary-Stu). 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.
Narm: Jessie's caffeine pill addiction, the Elvis episode, dear god the Elvis episode, though in the case of the Elvis episode it was probably intentional.
One True Threesome: In-universe example...well at least in Screech's mind. In the episode where he 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 Scott. 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. Also, her actress's poor skills were the icing on the cake.
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. Cast members 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, the character of Tori was hastily created to fill in the roles left by the absence of the two aforementioned characters, and especially in the case of Kaposwki's absence, serve as a love interest for Zack Morris.
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 Scott 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 SBTB 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 SBTB 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.
In "The Friendship Business" episode, during Zack's dream sequence about becoming rich, while he, Jessie and Kelly are all rich and Screech is playing Robin Screech (a play on Robin Leach, har har har), Slater and Lisa are laborers that work for Zack.
Also in "The Fight" episode where Zack and Slater are fighting over a new girl at Bayside named Joanna, when she and Zack are studying in his room, Slater interrupts by cleaning his room while using a leaf blower. I repeat, a leaf blower. Why bother? The audience would have easily understood the joke if he used a vacuum (which would have made more sense, anyway) instead.