I think riding a cruiser with half helmet and jeans and t-shirt is still quite a bit different than riding a sport bike in the same apparel. Sportbikes are made for a knee dragging style of riding, which is going to present more risk of low-siding like that. I'm not leaning my bike nearly that much in the corners. Not to say that things can't go horribly wrong, but they seem to go wrong a lot less on a cruiser. I will always wear 1/2 helmet, jeans and boots at a minimum.

Always remember to be yourself. Unless you suck. Then pretend to be someone else.