In my experience, if I take contact with a new word without feeling some emotion, this word is condemned to be lost.
And this concern sentences too.
I have some sentence in my mind, still sounding like the first time I've heard from somebody or even in a movie.
And so I think one strong quality of learning by talking in audio chat and better in video chat, is the emotional activation.
I'm curious about Your experience.
And I'd like to discuss about our emotional experience in the process of language exchange.