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.
Die for Our Ship: Averted for Mai. The author has a long explanation for why she does no see the two working out, and states that she genuinely likes Mai as a character, but feels there are certain things that canon left unadressed that could cause issues.
Foe Yay/Ho Yay: Jet gets officially Ret Canoned into being a bisexual who is obsessed with Zuko by the author, on account of the interactions between him and "Lee" in canon.
Fridge Brilliance: The Earth Kingdom has different attitudes and better understanding of psychology. If the Dai Li are able to have the most sophisticated mind techinques, it implies that they have a good understanding of psychology and how the mind works.
Which is why in Not Stalking Firelord Zuko, Azula doesn't have a true therapist as Dr. Yang has no experience with psychology while in Jet's Troubling Obsession Smellerbee, Longshot and Zuko were able to send Jet to a psychologist.
Fridge Horror: Untrained firebenders in Sozin's comet had their powers increased to dangerous levels...
What kind of power did Ozai to disappear a public figure like Princess Ursa?
The Joo Dees
Ron the Death Eater: Averted, for a shipping fic. The writer respects the canon ships and respect the characters. All perceived jerkiness or promiscuity from Mai or Jin is due to Katara and Jet being an Unreliable Narrator. Otherwise the fic justifies why the pairing wouldn't work out in the context of the writing
Tear Jerker: Katara having no idea what to do after Zuko is electrocuted and her nearly having a Heroic BSOD over it. Just her helplessness about it.