Totally agree with this one.
It always makes me sad when I view threads about big music collections and read that people have recently gone through their collection and deleted/thrown away some albums that they haven't listened to for ages or that they don't like.
What a waste!
Who's to say you won't find at least one gem in there that you had previously overlooked? We all change, and so do our tastes. One years bad album can be another years anthem...unfortunately, the reverse can also be true