The more noise the better. Not necessarily volume, but just viscerality and carnal lust spilling out in random noises... oh I love it when ktspktsp is so turned on. He has gotten more expressive during sex over the time we've been together, and I can't get enough. I love his moans and groans and eye-rolls (those are quiet, but I love them too).
And I think I'm fairly loud, but it's repetitive... I get into a rhythm. I find that I can't cum when I am being loud, though. I have to make myself be quiet and still, when it gets near the end point, to latch on to those sensations and allow myself to orgasm with ktspktsp at the helm (rather, down in the hatch?).
The best noises are the ones that we hear on old videos we made of ourselves... god it's hot watching/listening to those.
