Honestly for me it depends on the time and mood and person. It is awesome when you are into it and (for me anyway) the guy gets a real thick grip of hair, pushes my head down to kind of make me deep throat, and says something to the idea of... "you really like sucking that dick don't you".....or if it is more of a slow intimate kind of moment maybe just some enthusiastic moaning. I do like the when the "rougher" ones tell me "suck my dick" or "put it in your mouth" but I am more submissive so that does get my kitty VERY wet.
But then there are some men that should just be quiet lol.
Because if you don't put some feeling into the talk then it sounds really funny and makes me lose my focus.