Several of ours have taken a fancy to toilet paper. Nothing like walking into the bathroom to find that brand new roll you just put out ALL over the room, in strips and in little tiny pieces.
Needless to say, the bathroom doors stay shut now.
Phoebe goes for toilet paper, but with a twist. When she hears the door shut and the fan go on in the downstairs bath, she runs over to the door, lays down by it, and starts meowing and reaching her paw under the door. Once you slide some TP under the door for her she's happy, but if you don't give her any she starts really yelling.