*When taking off the security seals, I have to pick so hard that I stretch the plastic cover.
*These same annoying things leave behind a sticky residue that then gets stuck to DVDs next to it on my shelf.
*When the paper cover insert is set in a little too high or too low and taking off the seals rips it.
But most of all... I REALLY FUCKING HATE when the plastic wrap around the DVD sticks to the fucking spine and there's no way in hell that you can get it all off and you're left with a DVD spine with blotchy plastic all over it.