Having had (and in most cases still have) Saddlebacks, OSBs, GOS, LBs, Welsh, Middlewhite, Berkshire, Kune kune, Tamworth, and even a mangalitza, as well as numerous crosses, I'm thoroughly with HH - Ignore everyone, and go with what you like the look of.
You are what you eat, and your pigs will taste of the environment in which you put them, and the feed you give them
They will be as fit as you allow them to - give them nothing to forage, pile their food in a simple heap, and the muscles will not get worked, and muscle = meat
Overfeed them, and any breed will get fat, watch the condition and don't feed purely by formulas
Spend time with your pigs, and all will be friendly
Don't take care with how you enclose them and they will break out