for me, I like anything genuine... excessively loud moaning or shouting usually just comes of as stupid and really annoying. Ive actually busted up laughing, at which point i made them kiss me. that seems to add intimacy that maybe they were lacking (?). Ultimately, its the sincerity that makes the difference. If its sincere, which is gauged really through feeling and connection with your partner, loud moaning can be a really turn on. Whimpering, cussing, etc all that can be hot. Personally, for me, I think that when i am vocal its something that i only want them to hear. So im inclined to whisper it closely... but that too depends. I hate to be a talker during sex anyhow, lol.