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: The Nanny
Bizarro Episode: The later season episode where Fran is approached by a woman who states that, due to a mix-up years ago, she might be Fran's actual mother and not Sylvia (and for a second, Fran believes it when she hears the woman's laugh, which sounds freakishly similar to Fran's own unique laugh). Of course, it turns out she's not, and the woman is never mentioned ever again.
Crowning Moment of Awesome: See Slap-Slap-Kiss below. Just as Niles and C.C. become official, there's a mishap with an elevator, and C.C. is trapped inside, the technicians unable to fix it. When Niles, Maxwell, and the rest arrive, C.C. decides to answer Niles's proposal from earlier. She accepts. Niles cheers and forces the door open with his bare hands.
During the glory years of Niles' and C.C.'s rivalry, it was often Niles who came out better off. But in one subversion, C.C. magnificently got the better of him. Whilst at the theatre, Niles convinces C.C. that Maxwell actually has four kids, and sends her off looking for the missing one. She returns to the house much later that night with a child in tow, and Niles rushes off in a panic, thinking that the kid's parents will be searching for him. However, C.C. was in on the prank the whole time, and she tops it off by refusing to pay the kid what she promised him, because: "You forgot to ask for your insulin."
Dude, Not Funny!: Some of Niles' digs at C.C. One time he even went as far telling her not to "do anything drastic" as he placed a knife into her purse when he found her in tears. It's understandable that some viewers didn't exactly find it endearing when she agreed to marry someone who had been so needlessly cruel and verbally abusive to her. Even in times when she didn't deserve it.
The cruel Reason You Suck Speech he gave her in season 6 when she continuously turned down several of his marriage proposals can count as well. The gist of what he tells her is that she's going to wind up completely alone, but that's honestly more favorable than marrying someone who had been so sadistically abusive to her (played for laughs of not).
Foe Yay: C.C. with Niles and, to a lesser extent, Fran.
"Funny Aneurysm" Moment: In the episode where Maxwell and Fran have to deal with the tabloid, we see a scene where the paper is printing lies about John F. Kennedy, Jr. And mere moments later, the tabloid editor openly brags about the way his paper exploits Princess Diana. Sadly, we all know what happened to both of these public figures within mere years of this episode's original airing...
Even worse, Diana's eventual death occurred when she was trying to escape from the paparazzi..who happen to be the primary antagonists of this very same episode.
Also, the fact that both Fran and her mother were so obsessed with Fran having children, it can be kind of hard to watch after you hear about Fran Drescher's battle with uterine cancer that required a radical hysterectomy and left her infertile with no children.
In one episode, Sylvia has a freak-out where she threatens to throw herself in the Hudson River, to which Fran responded "Ma, flooding New Jersey is not gonna solve anything!" Flash forward to Fall 2012 and watch what happened to the state after Hurricane Sandy.
Germans Love David Hasselhoff: The show the was immensely popular in many countries outside USA (Argentina, Australia, Chile and Russia, to name a few). It's also very popular in Mexico. It does help the Mexican dub was really good.
Harsher in Hindsight: In one episode, Fran fears that her mother might be having an affair (she's not, she's just flirting with the butcher to get low priced meat) and in another, a lonely and desperate Niles asks himself if Sylvia would ever leave Morty. Skip ahead to the final season, and Sylvia really does start having an affair and almost leaves Morty.
While Maggie was doing that particular research, she also noted that Maxwell was the only member of his family to not have the title of "Sir" or "Lord" in his name (except for another uncle who thought he was a leprechaun.) In reality, Charles Shaughnessy is the 5th Baron Shaughnessy, so he is an actual Lord.
In a later season episode, Fran admits some crab she served was "Krab with a K".
The season 6 Thanksgiving episode (the one in which Fran finds out she's pregnant for real). Morty is seen watching the football game, and he said the he should have bet on Pittsburgh. The Steelers actually did play the Detroit Lions that Thanksgiving, and they lost on a controversial coin flip, now forever infamous to Steeler fans.
As the series ended, Maxwell moved to Hollywood and left the theater business. After that, it was announced in real-life media Cats would no longer be on stage.
In an early season, while snowed in at Sylvia's house, Maggie begins to flirt with another boy in the building named Kenny. At the end of the episode, he says that after he graduates from medical school, he's going to go right into stand-up comedy as kind of a giant joke on his parents. Funny then, but since Ken Jeong did the same thing (although he did spend a lot of time as a doctor and did stand-up as a hobby,) it's even funnier.
Ho Yay: Maxwell and Niles occasionally had some. Like when Maxwell revealed he was going to propose to Fran, Niles reacted as if he was getting proposed to.
Jerkass Woobie: CC. She may be a horrible, greedy, selfish person, but all the crap she takes, you can't help but have a tiny bit of sympathy for her.
Played with when Maxwell hires a lesbian promoter (he thought she was straight) and she mistakes Fran for being gay since Fran "is over 30 and she has no man in her life." Fran responds with "I'm not gay, I'm just pathetic."
Fran's obsession with Barbara Streisand would occasionally dip into a Psycho LesbianStalker with a Crush territory as well. She had a wig like Streisand's hair, stole her shoe when she visited her house, and when her sister Rosalind Kind visited the house, she declared "Close enough, same DNA!!!" and began kissing her feet.
Mondegreen: "She was working in a bridal shop in Flushing, Queens..."
Never Live It Down: Maxwell frequently gets criticized by Fran and Niles for passing on producing Cats, but he asserts he did the right thing.
In one episode, it was revealed that he also passed on Tommy and Hair, as well.
It was also revealed that C.C. convinced him to pass on Cats
When it looked like they were going to die in a plane crash, Maxwell confessed his feelings for Fran. They survived, but Maxwell then took it back... and went back and forth another time. "The thing" haunted Maxwell for that season.
Nightmare Fuel: From What The Butler Sung, C.C.'s enraged "NANNY FINE!!!" seems hilarious at first, but play it in slow motion and C.C.'s angry face is enough to give small children nightmares for years.
No Yay: Niles and Nanny Mueller in "The Nanny-In-Law". That's not just Squick, that's Nightmare Fuel! Noted in-universe when Maxwell—after seeing them—stammers "I...I...I don't ever want to see that again!"