Most of my stuff like that had to be abandoned when I was moving between places because there wasn't space to bring it, rather than no space to store it. I do have other paperwork that goes back to when I was 15, and I've got a nearly full set of school reports back to primary school. Things I do regret losing are letters from penfriends and some of the more creative school work - a few bits of art stuff, creative writing and so on.