The reason I don't show my CD collection are because of the people that look at it and say, "Oh what a great collection. It'll be great to make copies of it!"
Uncomfortable cause I don't want them to. Not just because of the artists' rights/income but because I've gone through 1000's of CDs bought and sold. I've put a huge effort and money into looking, choosing, listening, trading, buying and selling music for a long time. I just don't buy music willy-nilly and keep it on a shelf.
Yup, I also have the very first CD I ever bought in 1986. Donald Fagan's Nightfly, still plays without a problem - yes, even after it's been stored in high heat and the cold.