My impression of Costco's selection is that it's the retail distillation of car-centric suburbs, despite it not being exclusively those people who shop there. The happy suburbanite cares about convenience and quantity above all else, from what I can tell anyway. They don't really have a varied sense of taste, they just want stuff, and they want easy access to that stuff. They like a "haul" that they do once a month,…
the lack of choices for similar products is a huge plus for me - speeds up the shopping process considerably, and their curation is pretty good