• Fail Polish: Roz starts out with horrific early-nineties hair and the kind of dress-suits that were common for women in that era. By the mid-nineties, she had much better-looking straight hair and often wore extremely tight shirts and leather pants. The difference is notable.

Was Roz ever meant to be unattractive? Seems unlikely, given her defining characteristic. As for the fashion sense - it was the early nineties then, of course she'd dress in early-nineties fashions...

Dropped this one — as the natter says he's a long time citizen.

• Fake American: Martin Crane, played by British actor John Mahoney.
  • That's debatable. Mahoney had been a US citizen for 34 of his 53 years when the show started, and his "normal" accent is more American than British.

Restoring this comment, because it's an interesting point. Possible that it would go better somewhere else on the page though.

[quote in which Frasier describes hot weather as being "like the Ninth Circle of Hell"]

• Which is a rare case of the writers (or Frasier) screwing up a cultural reference. According to The Divine Comedy the Ninth Circle is unbearably cold.

In response to the edit reason: "No. They treat it like Hell as an inferno. Dante's vision of hell is NOT the popular vision. They make more references to Hell being hot throughout the series."

No-one's saying the characters don't think Hell is hot. They're saying the specific concept of the Ninth Circle of Hell is from Dante Alighieri's The Divine Comedy, in which it's described as very cold. Frasier has read it, and he'd know that, and he'd probably be very pedantic about it as well.

Aversions are only worth listing when there are very few of them. There are plenty of kids in fiction not subject to this trope.

• Soap Opera Rapid Aging Syndrome: Averted with Frederick and Alice - as they mostly used the same actors their age was taken into account whenever they appeared, with the character behaving appropriately for their age. It helps that Frederick was played by the same actor for ten years of the show.

• The joke being, of course, that Dan Butler (Bulldog), David Hyde Pierce (Niles) and John Mahoney (Martin) are all gay.

The first two I don't dispute, but Mahoney? A quick Google search only brings up examples of people speculating that he might be gay without no sources given, and Wikipedia doesn't make any mention of it either.