Heartwarming / Guards! Guards!

• When Sybil is menaced by a mob who are targeting her dragons, Vimes saves her with a miniature dragon and a Dirty Harry parody scene. This pops up later on to form the moment when Sybil and Vimes starting getting closer:
  Vimes: As far as I'm concerned this city and this dragon deserve each other!
  Sybil: People are frightened. You can't ask much of people when they're frightened. Not everyone's as brave as you.
• Possibly one of the best Discworld moments is at the end showing Vimes and Sybil's blossoming relationship in the perfect terms — (paraphrased):
  'What was it? Oh, yes... it's a one-in-a-million chance, he said, but it just might work.'
  And she smiled at him. It occurred to him that in her own special category of women, she was quite beautiful - and that was the category of all the women, in all his life, who had ever thought him worth smiling at. [...] The woman was a city.
  • Here's looking at you, kid.
• Vimes witnesses what he briefly believes to be the deaths of Colon, Nobby, and Carrot:
  The crowd watched in bemusement as the superhot blast flung it into the sky and barely noticed Vimes as he pushed his way, wheezing and crying, through the press of bodies. [...] “Thirty dollars a month!” he muttered. “That's what they died for! Thirty dollars! And I docked some from Nobby. I had to, didn't I? I mean, that man could make a melon go rusty!”
  [...]
  “ 'allo, Captain,” said an ingratiating voice.
  Vimes looked down. A small and stagnant pond disguised as Nobby grinned sheepishly up at him.
  “I thought you were dead!” he said.
  “We're not,” said Nobby.
  “Oh. Good.” There didn't seem much else to say.
• Vimes is still mentally reeling from Vetinari's analysis of the human condition when he, Carrot, Colon, and Nobby come in to receive their reward. They ask for nothing more than a five-dollar raise, a new tea kettle to replace the one they lost, and a dartboard, restoring his faith in humanity and leaving everyone present, even Vetinari himself, stunned into silence.