I don't get the loud pipes either, and I ride an Electra Glide, with stock pipes. The only thing I changed on the EGlide was the windshield, so I look over it. Instead of spending $5,000 on pipes, jets, chrome and skulls, I bought a 2001 BMW 1150 GS. Both great bikes, for me.
As far as tips from Harley riders, they can be as right or wrong as riders of any other manufacturer.