Good Omens/YMMV


 * Acceptable Targets: Crowley is particularly proud of his influence in the creation of Manchester and the M25. Hastur also accidentally makes the world a better place by massacring a slew of telemarketers.)
 * The much-maligned "new town" of Milton Keynes, which neither Crowley nor Aziraphale had a hand in, but both of their superiors were pleased with.
 * Every music cassette in a car turns into The Best of Queen if left there longer than a fortnight. Queen fans find this awesome.
 * This is not so much a Take That aimed at Queen as it is a joke about the ubiquitous nature of Queen's Greatest Hits I in car stereos throughout the UK. Terry Pratchett explained it like this: eventually you get so sick of inane local radio that you pull off the motorway and go to a service (gas) station to find something worth listening to. The only thing on the paltry rack of cassettes that is at all worth buying is invariably The Best Of Queen. (There are doubtless several things that are outdated with this scenario - CD changers, iPods, better radio stations, better stocked service stations - but it was brilliant for its time.)
 * "Nothing but dust and fundamentalists."
 * Angel-Devil Shipping: Crowley and Aziraphale. Subverted though, since they're both Not So Different.
 * Cargo Ship: The Bentley is paired with Crowley and Aziraphale. No, really.
 * There is also a Bentley/Bookshop Fanfic floating around somewhere.
 * Complete Monster: Crowley notes that, unlike most demons, Hastur and Ligur actively like being evil. Also the Four Horsepeople (except Death, and maybe Pollution ) Famine in particular gets pleasure out of watching anorexic people starve themselves to death, while War destroys peaceful countries so she can sell them weaponry.
 * Evil Is Sexy: Crowley.
 * Also War.
 * Fan-Preferred Couple: Crowley and Aziraphale. Or, if you're into it, Pepper/War is becoming quite popular.
 * Fan True Name: Crowley's 'angelic' name is never given, but Kireawel or Caphriel is popular in fanfiction.
 * Also Gadriel, as it is listed in some theology books as being the name of the fallen who tempted Eve with the apple.
 * Genius Bonus / Punny Name: The etymology of "nice" (or "niƒe" if you prefer) has changed drastically over the centuries. Roughly around the time Agnes would have written her book it could indeed have meant "precise". However it's original meaning was "foolish" or "stupid." Then there is the modern meaning attached to the word. They all apply to some extent.
 * Ho Yay: Or possibly Foe Yay, depending. Crowley and Aziraphale - not that they technically have sex. See also Heterosexual Life Partners.
 * There is a particularly ship-worthy line towards the end of the book: "And perhaps the recent exertions had had some fallout on the nature of reality because, while they were eating, for the first time ever, a nightingale sang in Berkeley Square."  The line comes rather out of nowhere and nothing is specified about the nature of said "exertions". One would assume it refers to Adam remaking reality, but "A Nightingale Sang in Berkeley Square" is an old and sappy romantic love song, whereas Adam is pretty clearly still at the cooties stage.
 * Magnificent Bastard: Crowley. Also, arguably, God and His ineffable Plan.
 * Memetic Outfit: It seems to be widely accepted as Fanon that Aziraphale wears argyle sweater vests and/or tartan. This is never mentioned in canon, though a camelhair coat briefly is.
 * Another common wardrobe choice that doesn't exist in canon is to give him glasses. Fans seem split on this, and there is a growing number who leave them off.
 * Moral Event Horizon: Played with, sort of. Crowley crosses it, at least in the eyes of the other demons, by daring to.
 * Interestingly, it is also his Crowning Moment of Awesome. Well, one of them, anyway.
 * Nightmare Fuel: The telemarketers. (Surprisingly, possibly the only instance in a book involving demons and the apocalypse.) Pterry blames Neil Gaiman for anything in the book involving maggots.
 * Take That: A possible subtle one at Pop Culture. When The Four Horsepersons of the Apocalypse gather at the Diner, they are not all immediately present, only War and The Tall Fellow with the Obscured Helmet---the latter playing a video trivia game with a bunch of bikers. Said game has four categores: Pop Culture, Sports, Music, and War. Famine then shows up, prompting the trivia category 'Music' to be changed to 'Famine.' When Pollution arrives, 'Sports' becomes 'Pollution.' Death having been present the whole time makes one wonder about Pop Culture.
 * Tsundere: Crowley is something of a Type A. He keeps saving people and doing good things, but snarks whenever Aziraphale points it out. He seems to want everyone to believe that he doesn't really mean it.
 * Aziraphale seems to have a bit of Type B in him, as well.
 * Both in a non-romantic sense, in terms of the canon.