I've veered between these two poles over the years. There have been times where I have accumulated things like scotch tape attracts dog hair. Those periods are often followed by a move or some other reason to purge myself of things that seem unnecessary to my life as it is at that moment—and as I envision it in the future.
Unfortunately, if you are not judicious about your purging, there will come a moment when you realize that you cannot find—and may never be able to find—some things that you very much wish you had kept.