8's are connected with antisocial personality disorder when unhealthy. Even my healthy 8 significant other, when pissed, will try to control me by taking my car keys, taking money and credit cards out of my wallet, etc. When actually unhealthy, they turn very antisocial and believe all people are disgusting, worthless, threatening, etc., and that everyone has an ulterior motive. They become very paranoid, especially thinking everyone is betraying them. They can become socially isolated, bitter, have a lack of conscience and empathy, and become hard-hearted. Unhealthy 8's can show episodes of rage, violence, and physical destruction, plotting vengeance, and retaliation against enemies. They can see themselves as outlaws, and be involved in criminal behaviors and circles. They strike back at society, as in sociopathy. In other words, they become the closest thing to a sociopath there is lol..... When angry, healthy 8's can show signs of it, as in, engaging in unhealthy behaviors temporarily.
My 8 SO can argue any side, even if he agrees with it or not. And when he is bored especially or has extra energy, he will argue points he does not believe in just for kicks. He expects you to figure out that he doesn't believe it, and to beat him at his own game. It's sport to him. His criticisms also are challenges. I have found ways to get around them, much as he does when he is criticized. He respects people who can challenge him and have good countering arguments, people who fight for what they want. He respects people who have strong boundaries, and are very expressive; people who are much like him. He has definitely strengthened me. If your 8 friend keeps criticizing you, chances are, he wants you to counter it, to tell him that no, he's wrong, and you will prove it to him. This could lead to a big, huge argument, one in which you will have to find a way to win eventually. Sometimes that means showing him that he's not so different from you, in showing him that hey, you left napkins on the counter, but he left hairs on the counter from shaving. (The "when did you become perfect?" counter) lol..... Once you show him the truth of the matter, he will stop doing it. And then eventually, you will have figured out how to get what you want from him, but it takes work. My 8 is not easily led or convinced. Sometimes it takes resources and time, but when it is enough to convince him, he will believe it, and he will change his tune. What I like about my 8 is that he will improve and grow with knowledge. Our relationship has grown into one of mutual respect. We both have criticisms of the other, and it is balanced. (In other words, you learn to become just as big of an asshole as he can be sometimes, and then you begin to realize, it's not nearly as serious to him as it is to me. I think people tend to take 8's way too seriously).
If you want an 8 partner, it really helps if you don't mind arguing on occasion, and you don't get too hurt by it or take it too seriously. If you hate to argue, don't pick an 8 partner lol.....it also helps to learn to wear him out so he doesn't have a lot of energy left over for arguing. lol...... Our relationship works because I keep goals in mind for the two of us, and keep us moving ahead, and working on projects. My 8 expects me to improve our personal lives, and to set goals in that direction. He does well in an office environment. He has little sp, so I have to take up the slack in that department.