This is a really interesting discussion. To me it seems that the whole helmet issue is to some extent influenced by the bike you ride. Living in a no helmet law state, I expect that if the discussion was being held on a local Harley site, well, there would be no discussion. Helmets on Harley riders around here are about as common as morality in a politician.
Having ridden BMWs for the last 20 years or so, most BMW riders would find the idea of 'what kind of helmet looks good on my bike' laughable. It would be like asking what color backpack should I wear when skydiving. The phrase ATGATT is treated as gospel by most BMW riders and if you suggest anything less they will show up at your house and take your bike away.
It appears that Rocket owners are indeed an eclectic bunch. Some will wear nothing but a full face helmet while others treat a helmet as strictly a weather dependent piece of clothing.
I don't mean to be judgemental, but the phrase '$10 head, $10 helmet' does come to mind. Well, maybe passing 60 has made me just a bit judgemental. Sorry.