Pigs are awesome pets. You must have a fenced in yard and a zoning permit. They grow for three years and if they are potbelly pigs, they will top off at about 100 pounds. It sounds huge, but they are knee high and about two feet long, very solid. Ours weighs about 50-60 but he won't let us pick him up so it may be less. He is smarter than our four dogs, very clean, does not smell, and listens to classical music all day. He never has accidents in the house.
As long as you like two year olds and are able to let him dig and have a place of his own that is warm (tool shed) or utility room, a pig might be a good pet for you. But please research websites from sanctuaries and potbelly pig associations, NOT breeders. They will lie and tell you the pig will stay little. Doesn't every baby- human, cat, dog,etc- grow up?
We got our Sheldon from a rescue. He is about 4 years old and does tricks. Pigs make more sounds than "oink" and they even bark. He will answer when you talk to him, and when he is upset, he complains. We are teaching him to walk on a leash, but it is hard since he is older. Usually when restrained pigs become food, so leashes are against their nature.
And for those who are thinking of being vegetarian-- I used to think that was weird and unnatural. I have fished and gutted fish, prepared countless roasts, and have seen chickens have their necks broken. Then one day after Sheldon came, a TV ad for a steakhouse made my stomach turn. All I could see was something dead.
Experiment with the idea and cut down on meat. Make stews and purees from vegetables and roots. Learn to love beans and get fresh vegetables from a local farm. Eat cheese pizza and lots of pasta. Try it out. It takes more grain to feed a cow that will produce 20 pounds of meat than if people just ate the grains themselves.