My house is rather messy with hard copies of huge amount of research papers that I printed out for my PhD. Although they are all kept nicely in folders - but they have taken rather lots of space in the house.
Although I have soft-copies of most of the research papers but personally I prefer to read from hard copies rather than computer (my eyes hurt when I read too much on computer).
I don't know what I want to do with my career yet (post PhD), and I am not sure whether it's worth to keep the hardcopies of research papers.
I wonder how many of you actually kept the stuff that you used for PhD (after the completion of your PhD). Are they worth to keep? If so, how long do you keep them?