I bought an SU set that was so cute. When I got it, I just kept trying to visualize how I would use it and the 'screen' was blank. Kept it for several years. Was on the 'Pay It Forward' thread and someone wished they had bought it so I sent it to her. She sent me the cutest 'Thank You' using it. I was happy that she would use it.
Yesterday, I was on some website that sell SU items. This stamp set was in the Rare Stamp section priced at $51.00. Oh we'll, it went to a good home where it was being used.
As others have stated, I have bought stamps that I was SURE I would use and they just didn't turn out to be useful to me. In fact, I should purge some of these stamps and find them a good home.