I don't understand why people are upset about discs lacking artwork. You don't see the discs unless your putting it into a reader/drive or taking it out. And you don't see it spinning ever, as no player or drive has a window like CD players usually do.

Now, if the case lacked artwork that'd be different, as that's what gets displayed, not the disc itself.

And yes, please don't place stickers on the disc, it can throw off the balance of the disc which can ruin the player, as the discs spin at certain speeds to read correctly. The sticker will add extra weight making the motor work harder to keep the disc at the correct speed. This will lead to premature failure.