I've known Quakers who are quiet-ish - mostly make low 'grumbling' type noises. Cute too! But tend to not poo down onto papers (don't wish cage to get dirty) and instead poo sideways - outside of cage? Not so cute.
Our Parrotlet chirps a lot, but is quiet enough that it's not a disturbing noise. Can be irritating if she's incessent on being with you. If she doesn't hear you in the house, she stops (eventually) and simply waits. But if she hears you and you don't come get her.....well, she's more than happy to let you know her displeasure - vocally.
Hope this helps, a bit.