Yup... rode an HD a few years back, and good lord what a piece of vibrating, ill-handling crap. So obnoxiously loud that it was embarrassing.
Also rode a big scooter... a BARFer was kind enough to let me take it for a spin... it's one of those bigger ones that he actually rode to Texas. Didn't like the whole "feet on the deck" thing, but what I really disliked was the HUGE windscreen... no air blowing through my slightly raised visor... it was like being in a car with the windows up. About half way through the ride, I found myself leaning slightly off to the side, so I could get some airflow!