Whilst I enjoy reading the speeches/backgrounds of the characters, I do not enjoy the speed at which they say it; I understand that 'it's rp!!' But also in real life you have people that say 'Yeah yeah, get to the point'
So: A button you can press to skip the chatter, with possible (funny, insulted, angry, confused or even undisturbed) side-effects to the conversation.
And while we're on the subject of realism, if the letters in the speech bubble could appear in a serialized, typewriter fashion (with possible speed slider in options) then my wish would be more than fulfilled.