Preferrably something that is at home amongst humans. I just don't think there are many 'wild' animals that make good pets. A few, but not many.
Come to think of it, a pokemon would be ideal. Not a strong pokemon, not one trained for fighting. Not something that's going to electrocute or burn or poison me either. Something small probably. Like a treeko, or a rattata, or a meowth.
Yeah. A meowth. I'm used to getting scratches from cats anyway.