I recently adopted 2 cats, a kitten named Tenshi, which is Angel in Japanese, and a full grown cat named Arashi, which is storm in Japanese. My sim is a musician and she has a piano in her living room. Tenshi is OBSESSED with this piano and I don't think he's ever been in any other room of the house except to fill his needs. I have a little roomba (it's not called that in-game, but it's a vacuum that moves around) that Arashi follows around all the time. I'm guessing that's his obsession. I haven't found out Tenshi's fear yet, but Arashi loathes the microwave