I collect yarn. Without my stash I would be going crazy. CRAZY!
Too poor to buy new stash, that's me. If its a ball or two to finish a project then its okay (assuming one can find the same dye lot).
While I was still collecting, I had to make a database, you know to keep track of what I had (as you can see by the picture!) I have over 105 MILES (169 kilometres) of yarn to track. Some of the yarns out there dont tell you how much you have in length but in weight, which is somewhat useless, to my mind.