My grandmother was a saver, and her specialty was paper items. It had been a total nightmare going through her piles and piles of endless pieces of paper. Organized papers, but still papers. Receipts, photos, shopping bags from all over the word, warranties for items she no longer had, just about ever paper thing you can imagine. We moved into her house 10 years ago. She has been gone now 3-1/2 years. We are still going through boxes.
As someone said earlier, once you have had that type of experience, you look at things differently.
I keep some things, especially at I just return home from a trip, but I tend to get rid of most of it eventually. I have learned no one else wants my stuff. It is only meaningful to me, so I try to go through it once in a while and re-evaluate whether I still want to keep it.