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.
Archive Panic: This arc is huge in every sense of the word. The bare bones of the arc itself, according to Wikipedia, comprise of material from Batman, Detective Comics, Shadow of the Bat, Legends of the Dark Knight, Robin, Catwoman, Showcase and Justice League Task Force. And that's not even getting into the supplementary material like the Vengeance of Bane special or the Sword of Azrael mini-series. And there's the two epilogue series, Prodigal and Troika, which help the story chalk up over one hundred issues in total. And it wasn't helped by the fact that DC only packaged "Knightfall" and "Knights End" in collected editions, but not either side of "Knightquest", though with the new "Knightfall" collection, it's been rectified somewhat: for some odd reason, "Knightfall" included Vengeance of Bane for left out Sword of Azrael while "Knightquest" only focused on "The Crusade" as Denny O'Neil considers "The Search" as something of an Old Shame.
Badass Decay: By the time of his final appearance in the story, Bane has lost a great deal of blood and has degenerated into a raving lunatic.
After a few appearances where he was badass again, the decay set back in and continued for a while into the comics, as well as into Batman & Robin, where Bane was portrayed as dumb muscle. Thankfully, Secret Six and more recently The Dark Knight Rises brought him back to his old, awesome self.
Creator's Pet: In the novelisation by Denny O'Neil, Bruce - during his journey to regain his capacity for violence - describes Lady Shiva as the "sexiest woman alive". Possibly crosses over with Author Appeal given Shiva was one of O'Neil's Pet Characters, fostered since her post-Crisis appearances in The Question.
Older Than They Think: This is the first time Dick Grayson takes up the mantle of Batman or rather during the Proginal storyline.
Squick: The Joker crashes his way into the hideout of fellow escapee Cornelius Stirk (who, believe it or not, is arguably more deranged than Joker is) and demands that Stirk team up with him to terrorize Commissioner Gordon. And all this while Stirk is stirring a pot full of boiling human hearts!
They were right. Azbats would have been the new Batman had they reacted positively to it and it sold well enough. The writers were hoping he wouldn't be popular, but they were prepared for the possibility. However, once Azbats started going out of control, culminating in breaking Batman's golden rule, the fans demanded he be put down.
Woolseyism: In the Mexican Spanish translation of the arc, Bane's famous line I will BREAK YOU! was translated as íTE DEJARE INVALIDO! (I WILL CRIPPLE YOU!) possibly because a literal translation of the line could sound too ridiculous in Spanish.