I am usually very noisy during sex. It is especially hard for me to be quiet while being pounded hard. The experience is so overwhelming its like I just have to release the tension somehow, and it comes out as sound. I also make a lot of noise when I orgasm.
As a change of pace, though, sometimes my husband gags me during sex. Most often he just shoves my panties in my mouth. We used to have a ball gag, but the latex ball started to break down and taste terrible, so we threw it away. Occasionally, he will just order me to be silent, which is a real challenge for me, but can provide a fresh element to our lovemaking.
I started masturbating as a teenager in my parents house, so I had to be completely silent, and I continued this habit into adulthood for a long while. I know it sounds weird, but sometimes when I was married to my ex-husband I just wanted to get off by myself but not to have sex with him. So I would masturbate very quietly in the bedroom while he was in the living room watching T.V. or whatever.
It wasnt until I left my ex that I realized it was okay to make noise even when just masturbating alone in my apartment. It was a nice discovery, because I think I enjoy the experience of orgasm more intensely when I am allowed to cry out.
Unlike me, my husband is relatively quiet during the act. However, he is even louder than me when he comes. I am pretty sure the neighbours can hear even when we have the windows closed. A few times he has even given me that distortion feeling in my ears like you get at a loud concert. Frequently he shouts my name, which I find very sexy.