It's THAT SOUND which makes it a Harley!
Ahh yes...
and then there's the sound of a well-tuned Ducati 996, or 999 with a carbon fiber ferracci exhaust... which sounds like a chevy 350 w/ a lumpy cam & glasspacks. Then you wonder "why am I riding this harley?" as the guy on the Ducati blows past you... leaving his heaven-sent big-twin sound right into your eardrums.