Most armies are in fact run by their sergeants - the officers are there just to give things a bit of tone and prevent warfare becoming a mere lower-class brawl.

For an author, the nice characters aren't much fun. What you want are the screwed up characters. You know, the characters that are constantly wondering if what they are doing is the right thing, characters that are not only screwed up but are self-tapping screws. They're doing it for themselves.

I wonder if it's like this for mountain climbers, he thought. You climb bigger and bigger mountains and you know that one day one of them is going to be just that bit too steep. But you go on doing it, because it’s so-o good when you breathe the air up there. And you know you'll die falling.

A police procedural novel can be even funnier if the police include Trolls and Dwarves and things like that. You start looking at the whole basis of the cop novel. You get the cop moving in a different way when you've actually set it in a fantasy city.

...inside every old person is a young person wondering what happened.

Just because someone's a member of an ethnic minority doesn't mean they're not a nasty small-minded little jerk [...]

The landscape was snow and green ice on broken mountains. These weren't old mountains, worn down by time and weather and full of gentle ski slopes, but young, sulky, adolescent mountains. They held secret ravines and merciless crevices. One yodel out of place would attract, not the jolly echo of a lonely goatherd, but fifty tons of express-delivery snow.