I think talking too much is a sign of narcissism. At least all the Ns I have known do it. My mother talked nonstop to everyone she met, hardly pausing for breath. Ironically, I her own dear little daughter, I was ignored, neglected and rarely spoken to.
My N ex husband was the same, 'conversation' was just a boring endless monologue of his voice. If I dared to try to speak he would say angrily "Don't interrupt me" or his favourite, "LET ME FINISH!!" but he never did finish. I was a quiet, avoidant type anyway so I never spoke much, which suited him.
If I persisted in trying to speak narc rage would set in. He would feel (I assume), insulted, indignant. How dare
If in company, and someone else spoke his eyes would glaze over, he would seem to go into a dream. He was unable to listen, only his own voice was of any interest to him.
Well, he was histrionic so unless he was the centre of attention he was bored silly anyway.
Other people's words are just an interference of outside noise.
Yes thats exactly it.
The journey of a thousand miles begins with a single step.