Personally, I like the Harley sound. The noise doesn't bother me at all. If anything, I'm glad that they are loud so I can hear them coming when I'm in my car. Most motorcyclists are defensive drivers, but the last thing I want to do is cut one off when they are riding in my blind spot. I think that these sport bike riders should take a tip from the Harley guys and make some noise.
However, the one thing I don't like about the Harley is the culture. Back in the day, a Harley was a bike ridden by gangstas. Now, everyone rides a Harley. Most Harley riders I know today are attempting to portray some type of bad-a$$ image that they do not fit in any way, shape, or form.
I do want to own a motorcycle in the future, but I think I may opt for a Honda or Triumph.