*Occasionally non-traditional values of interesting.
Never seems an unnecessarily extreme limit on this, I don't suspect there is much which by stopping existing will also cause me to not exist. Is this supposed to be an existential preposition? Are there objects which if they stop existing I would also stop existing? Are we objects at all or just the figment of a deranged imagination?
Also Hydrogen, Carbon, Oxygen, Nitrogen, Phosphorous and Sulphur. Assuming we're not all imaginary.
Cats, because everyone needs animals that will eat them if they die.