I raised meat pigs for the county fair back in the day.
Pigs are very sociable, extremely intelligent, very easy to train. All you have to do is invest the time and interest in them. My pigs were like dogs. They were extremely well mannered, followed me around like dogs. I placed very high in Showmanship because they listened so well.
That said, full- sized pigs grow to be simply enormous. You must realize that generally pigs are auctioned off for meat as mere juveniles, 250-280lbs. If not slaughtered, they will mature to around 500- and I've seen some enormous 800 pounders. It's not impossible.
Even breeding sows become quite huge.
Other than that, if you give them room (like a pasture) they will tear it to pieces and rut up the whole thing. Every. Single. Inch. Be prepared for that.
"There are two ways to live your life. One is as though nothing is a miracle. The other is as though everything is a miracle." -- Albert Einstein