I may have mentioned before that there are people worth listening to, because they are opinionated and interesting, but not good to discuss things with. It is emphatically not a left-right thing, as I am thinking of two examples from each camp as I write this. They are folks who cannot listen themselves, so whatever point you make, they accuse you of meaning something else. I can seldom tell whether this is a rhetorical ploy on their part to win arguments or if they truly see the world as either 100% agreeing with them or being completely opposed. I suspect the latter.
This phenomenon is often found in conjunction with people who cannot attack your point without attacking you as well, usually with dripping sarcasm. They put their energy into the insult instead of the argument.
I imagine many writers I love to read could fall into this category. Their skill is in expressing, not balancing. PJ O'Rourke or Mark Steyn might both be pleasant boon companions - but there is some chance that having a conversation with them with even the slightest disagreement would be impossible.