Personally, a quiet motorcycle is important to me, although really more in terms of turbulence and wind management. I run stock exhaust on my bikes. I have a rubber mount sportster, and although thumpy at low revs, it's glass smooth through most of the useful rpm range. Additionally, I find the HD vibrations very mellow and slow, whereas I find a buzzy i4 to be pretty bothersome after a while.
I see the appeal of an electric bike for the flat, instant torque, but I would be a ways from buying one due to range anxiety and availability of charging stations. I could see how the live wire doesn't appeal to most core HD fans. Pretty rare to see a HD with the quiet stock pipes around here.
All that said about my Harley (which I quite like), I bought an NT700VA a few days ago, and will be selling the sportster.