People who can't listen to the other person are annoying to the point of gnashing their teeth. Some of them are just waiting to start talking about themselves. You tell a story and mention some insignificant detail in passing (let's say you bought a Coke). Immediately he/she goes, "Oh, I don't know, I don't drink coke!" Okay, geez, take a brownie off the shelf, just let me tell it properly. Very unpleasant, especially when you, in turn, carefully listen to the interlocutor and respect his right to speak.