This article is part of CNN Underscored’s Guide to Coffee, a two-week focus on everything coffee, from the best methods for brewing it to the best machines to do so and the accessories and gear you ...

There’s something about making a cup of coffee that riles people up. Somehow, each debate breeds its own sub-debates — brewer vs. pour over. Hario vs. Chemex. Medium grind vs. coarse grind, and so on.