I moan, grunt, or hopefully squeal. All depends on how I'm getting fucked and how good it feels.
If it's one of those i can't claw and bite down hard enough fucks (and i hope it is) where my cock is just drewling precum and then leaves me quivering afterwards; oh i make a ton of noise. Say all sorts of things to help fuel that fire anything to let my top know that he's hitting my spot and how much I'm loving it.
I'll never fake a sound or say anything disingenuous, it's all natural from me.
As a top i love a verbally actuve bottom helps guide me to where i want to go with my him. I just can't stand a dead fish, you know the lay there and do me bottoms. Would rather just jerk off then waste my time with those