Goats! They are a have a nice combination of dog and cat qualities. The older ones are very independent and use their intelligence more, but the younger ones can be more doglike and will follow a person around wanting to be pet. The odd thing is that their personalities seem to change as they gain seniority, they seem to know when they have to be the responsible and smart ones in the herd. Plus goats are very "metal"! Although the ones I've owned hate music to be honest, really hate it, they seem to find it really confusing for some reason.
I've also heard that Ducks of all things can be great pets if you raise them to be tame, although I've never owned one.
Has anyone ever had a Parrot? Can you teach them to sing metal? I bet you could.
I once knew a guy that had a semi-tame Bat living in his cabin for years. The thing flew in to sleep every day, and I think it hibernated under the eaves in winter. Gave me the creeps not because it was a bat per se, but because of the possible rabies issue.