We don't have any TV in our house. The only time there is no noise in our house is when DS is really hungry and trying to eat quickly. The rest of the time, it is a barrage of questions. I am an introvert and do like to think quietly. But, that is one of the things that I gave up after becoming a parent. It is emotionally exhausting and it feels like there is no time to gather my own thoughts.
The things that help me are structured extracurricular activities - I get an hour to myself when someone else is putting DS through his paces. And the bonus is that he enjoys them and he gets tired enough to fall asleep in the nights without a million questions arising at bedtime.