I have built several cars through the years and am old enough now to realize that quiet and smooth running are a big part of enjoying the car.
A moderate cam, under car exhaust, insulation under the floormats etc all contribute to make an enjoyable ride for me.
That's not to say my car is "quiet" my wife can hear me coming home about a mile away. The noise just goes out the back of the car and I don't hear it so much...
