I always thought having a mini pig would be great, although IIRC there aren't any that stay small. I had a family friend who got one and he loved it to death, he said it was a great pet, super nice, clean, and smart. It kept growing though and capped out at like 200lbs or something ridiculous like that. It got so big that his family he lived with refused to let it keep staying in the house, so he made a pen for it in their yard. The pig was accustomed to being a "house pig" though, and putting it outside made it horribly depressed. It stopped eating and eventually died :(