Here's a small bit of characterization I loved when I read it, long ago and before I paid much attention to such things. I haven't read the scene in a while, so the details might be off, but here's the gist:
McGee and Meyer are in a local restaurant and Meyer orders the chili. (Meyer is himself a wondrous chili cook.) Now from the set-up and dialog with the locals, this is hot chili, and the locals drift over to watch Meyer's reaction. The unspoken assumption is that he is gonna take a bite and then break a land speed record in the Reach-for-the-water-glass event.
So Meyer takes a bite. Doesn't speak.
The locals grin. Here it comes ...
Meyer reaches for a bottle of Louisiana hot sauce. Sprinkles it liberally upon the chili. Takes another bite. Nods. "That's about right," he says.
Me, I think that's a wonderful bit of business that goes right to Meyer's character. Moran can probably tell us right off which book it was from. (And I confess I always kind of saw McDonald's face whenever Meyer showed up.)