All Women Love Shoes: Subverted to show her unfeminine side. Not having heels makes her shorter than most everybody else, which adds an element of elfin charm.
Fangirl: For Star Wars and only Star Wars. She dressed like Princess Leia for her wedding and scoffed at visiting Harry Potter World in Orlando: "I'm not some kind of nerdery slut!"
Flanderization: Initially he was only a moderate Republican and even set Liz up on a date when convinced she was gay. Overtime, he's called Barack Obama a "communist", keeps a framed picture of Nixon in his office, has Avery wear a Reagan mask on webcam, and is constantly making fun of anything he considers Liberal. This is likely a joke about Alec Baldwin's staunch left-wing views.
Sidekick Ex Machina: A lot of the plots have Liz struggling when she is unable to call on Jack's omnipotence or her surprise when he steps in and resolves issues far beyond her mortal ken.
Man Child: Part of his image since, as a celebrity, he basically gets to be a Karma Houdini.
Multiple-Choice Past: Generally, he always grew up poor in the Bronx. Details beyond that seem to be somewhat variable and change according to the needs of the current gag. Of course, you can never be sure how much of what Tracy says about himself is true.
Villain with Good Publicity: After starring in a tough social drama, he can't get anyone to view him as crazy anymore, much to his annoyance. "I can't stop the horrible respect people have for me."
Attention Whore: Big time. She even considered having a baby to get more attention.
Though she does resort to Suspiciously Specific Denial to try to put bad attention behind her: "I don't know what you're talking about, and that was two years ago."
Dumb Blonde: Surprisingly averted. She is, however, monstrously self-obsessed and will do anything for attention.
Hidden Depths: Once proved herself a surprisingly efficient businesswoman.
Narcissist: A fairly accurate portrayal of a more extreme case. She lacks empathy, has a disproportionately large ego, and is threatened easily by the opinions of others — but she does have genuine affection for a small handful of people, and is capable of (limited) remorse.
The Sociopath: In one episode, Pete and the writers test her to see if she is one. When she shows genuine remorse for hurting Kenneth, however, he deems her an "extreme narcissist" instead.
Weird Aside: "That's a double edged sword, like the one Mickey Rourke tried to kill me with." "Telling Dennis off last night was so empowering, I was so pumped on the way home that I tossed a brick through the window of a Banana Republic!" "I still think the album would have sold better had he shot me in the face!"
In the finale, it's Implied in a Medium Aware moment when she says "I've never met Mickey Rourke" that she made up all those stories.
Expansion Pack Past: Along with most people on the show, but him especially. He's lived forever/300 years/at least long enough to coach Shirley Temple, spent a summer captured by hill folk, his family joined a militia, he randomly speaks Latin...
Incorruptible Pure Pureness: Everyone on the staff treats him horribly, but he doesn't complain because he loves his job.
Jack goes so far as to fake a "not enough oxygen, Someone Has to Die" scenario just to see how far he'll go. Kenneth tries to sacrifice himself without the slightest hesitation, weirding Jack out.
Living Bodysuit: According to Kenneth's mother, he told her when he was born that he was an immortal being using Kenneth's body as a vessel.
Never Gets Drunk: He's able to outdrink the Teamsters in a contest after he realizes he's been drinking that stuff since he was a baby.
Expansion Pack Past: as told by Pete in season 6 "My father was a congressman, I was valedictorian at St. Andrew's, an Olympic Archer, fourth guitarist in Loverboy as a teenager." Immediately lampshaded by Jack " If it weren't all true I would say it doesn't even make sense."
Hidden Depths: He's an impeccable archer and a pretty good musician.
Jaded Washout: Definitely jaded, though not exactly a washout. Although he did get denied the chance to participate in the olympics, and a DUI prevented him from being a Congressman. He still manages to keep his sanity and tends not to relive his past glory.
Not so Above It All: Has been becoming increasingly unstable as the series goes on.
Only Sane Employee: Slightly less sane than Liz, but that's just because he's far more cynical
Parental Abandonment: Inverted. Pete confesses to wanting to run away from his wife with each of her seven pregnancies, but he always comes back.
The Straight and Arrow Path: It's rare that it's relevant, but there have been a few times where his archery skills resolved the episode's conflict.
Frank Rossitano
Played By: Judah Friedlander
Cake Eater: He also likes younger women, but older women are the only ones he has success with.
Liz's young, airheaded assistant, who is treated as the resident hot girl.
Hidden Depths: She disapproves of Greek treatment of Cyprus, she knows the exact speed of light, and she's just saner in general than most people at TGS.
Meaningful Name: She's a copy girl, and Los Angeles is apparently brimming with girls who look exactly like her.
Boomerang Bigot: James himself isn't one, but he's horrified when he learns that his ancestor, whom he thought was the highest-ranking black officer in the Union army, was actually a Confederate officer.
Liz's boyfriend at the beginning of the series. Generally disliked by all the characters but keeps on finding ways back into Liz's life every so often.
The Bus Came Back: Makes a cameo in the finale, appearing so she can join in a threesome between Jack and Nancy. Apparently it was so good it turned her British.
The Cameo: Appears for the finale during Jack's quest for happiness and meaning. It involves getting into a threesome with Jack and Elisa.
Hollywood New England: Some of her characteristics—including her accent, sports fandom, and attitude towards marriage—are almost ludicrously stereotypically Boston Irish.