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.
He's arguably a parody of this, since he's usually portrayed as a talentless buffoon who makes Z-Grade movies which only make money due to appealing to the Lowest Common Denominator, and pretty much everyone but Kenneth hates working with him. His only real talent is being crazy and pretending to be crazier.
On the other hand, Tracy has had many Pet the Dog moments, such as his unwavering devotion to his wife.
Dude, Not Funny!: An in-universe example, as Tracy makes an inappropriate (unheard) joke about Madeleine Albright at a dinner. Bill Clinton looks completely embarrassed by him.
Tracy: What? She does look like one of those!
Ear Worm: A number of the original songs, including Jenna's "Muffin Top," and Tracy's Christmas song.
Ensemble Darkhorse Kenneth is a main-cast example, Grizz and Dot Com are recurring cast examples.
Foe Yay: Between Jack and Devon. Devon seems to genuinely be attracted to Jack, and Jack accuses him of denying his sexual orientation in order to be promoted to CEO of General Electric.
"Funny Aneurysm" Moment: In "Jack Meets Dennis", when Liz and Pete are dreading the impending broadcast of a terrible episode of TGS, Pete speculates that a major news item will pre-empt the show, and then inquires about Gerald Ford's health. Ford died about a month later.
The following season on "Sandwich Day," one of the sketch ideas on the TGS whiteboard is "pervert Elmo."
In "Black Light Attack!" the sight of Tina Fey bent over was meant to be unappealing. Yeah right.
Jerkass Woobie: Jack takes a level in this towards the end of the series. Especially at the end of the series where the final episode has him try o find something that makes him genuinely happy instead of his percieved notion of happiness.
Parodied when Jenna hooks up with James Franco. She claims that the media just calling them "James" is this.
Jack/Liz shippers have not done this. Understandable, considering their choices are "Jiz" and "Lack". Or "Lick". Or, if you use last names, "Demon".
Squick: Jack has been imprinted to be aroused by the song "Merry Little Christmas" because of his mother's sultry annual performances of it as a child.
Strawman Has a Point: Every man hates Liz for writing "Deal Breakers" a self help book that encourages women to break up with their men if they are "Deal Breakers". The problem is that Liz talked to NOT ONE MAN in making this book, which is brought up repeatedly.
This is probably intentional as Jack outright states that Liz isn't even remotely qualified to give relationship when she's considering writing it and that the move is more for publicity than anything else.
Alas, Poor Scrappy: She ultimately gets captured by Kim-Jong-Il. And was married to his son.
Tracy and Jenna can be like this half of their screen time.
But the biggest one is Hazel Wassername. Although Kenneth remained on the show, the fact that she took his job makes her a partial Replacement Scrappy. Somewhat mitigated by the fact that she's kind of a villain.
Unfortunate Implications: "Goodbye, My Friend", the Aesop of which is arguably "If you're facing an accidental pregnancy, keep the child, even if you're young and stupid and have no there's no reason to believe you'll be any good at raising it."
Somewhat diminished by the constant comparisons of that couple to Pete and his wife. Tim has absolutely no development beyond having a temporary freak out over his girlfriend becoming pregnant (hardly the most unusual of responses). For all the audience knows, he could be more than capable of supporting a family or he could be unemployed and living with his parents. Perhaps there is a slight amount of Unfortunate Implications in that people automatically assume a white guy in his early to mid 20's is a loser.
In addition, the actual Aesop is take responsibility for your own actions. She decided to keep the baby, and he ran away.
No Bisexuals is brought up in "Kidney Now!" where Liz says bisexuality was invented by shampoo companies to the applause of the studio audience of the talk show she was on.
to be fair, this got exacerbated around the time Queen of Jordan went on the air, so it could very well be put on. Otherwise, she usually only brings up race to touch on something problematic done by another character (I.E. Liz's Tracy impression)
"Unwindulax" has a subplot which seems to suggest that no black person would ever vote for Romney simply because Obama is black. (Which is weird, since a fictional black politician became Romney's running mate two episode earlier.)
The break up of Avery and Jack is this, as it seems that Avery has slight PTSD symptoms from being a captive of North Korea for over a year and no one thinks her erratic behavior is worth looking into.
It is, however, worth noting that 30 Rock takes place in a world that runs on the Ruleof Funny, where clichés like Aesops are often laughed at, racial stereotypes are subverted, averted, inverted, and played straight depending on what's funniest at any given moment, a central character marries a she-man, and offscreen personal tragedies are regularly brought up and brushed aside as one-off gags.
"Brooklyn Without Limits" takes a pretty harsh potshot at Urban Outfitters.
The Woobie: Kenneth. The way he's so happy in a Crapsaccharine World and how he sees everyone as a potential friend (even though many of his friends could care less about him) and gets physically assaulted at work repeatedly (even on his brother).