Oh, I can totally relate with this, as it's a thing many people have in Romania, as well. I think it comes from not having. Here, at least, people take or used to take a step back when they saw a brand name and liked to preserve boxes and wrapping from "fancy" products. I know people who have such stacks too. :D
It can be hard to quit, especially if (like here) it's a learned habit. Thank you for your entry, great job!