What is it about thread?????

I have been sorting through my threads and fabrics and trying to whittle down the stash a little.
I have sorted these out to find new homes as I will never live long enough to use them all. They are all better used in bobbinwork or couching I think rather than machine embroidery or quilting.
After making the decision to put them onto Ebay why do I find myself trying to make excuses/reasons to keep them????