Which unusual pet do you desire to call your own?

I'm having a hard time deciding whether or not I want a bat, a crow, or a shark.

Bats are good for scaring people with, I guess, and I can attach a camera to one and have him spy on people for me.

Crows are pretty cool, they're very intelligent birds with excellent communication skills. When they attack people, they usually aim straight for the eyes or the neck; if I'm cool with them, maybe they'll protect me or something, but they'll probably shake me down for food and shiny objects in return for their protection. Anyone who messes with me might find himself in a "cawffin." Oh, and because most of the birds from the Corvidae family can imitate sounds that they hear, I can use one to annoy or torment people (I'll have it learn to imitate a blow-horn).

I don't know what I'd do with a shark, but I'd feel like a James Bond villain, which I imagine would be a pretty cool feeling.