I think sometimes it is - it's either personal preference or the local "celebrity" of a drink, or even, I think, the idea we have in our heads that Napoleon is selective or high maintenance (which I think he is when he can be, though clearly as a spy he has to be OK with roughing it).

I consider single malt to be suitable for such a man, so that's why I chose it. That it's my own favorite played a role, but it's also that it's generally considered an upscale, selective kind of drink.

I mean, I don't think many fanfic writers would say "Sure, Napoleon drinks two buck chuck." He just doesn't come across that way.