I've stated it elsewhere, but I agree with this. Those constantly-repeating NPC monologues were pretty unbearable, particularly in the Enhanced Edition. Even if not removing them, at least turn down the frequency by a lot.
Barring that, add a slider in the Sound controls for voice, since I can do without voice acting. Honestly, I'd rather read the dialogue, and it's hard to do that with someone talking over it. Just make sure the slider doesn't affect combat grunts, only spoken words.