Heres my experience thus far as a casual bicyclist.
I grew up with my bicycle, I rode EVERYWHERE on it. Id go thruogh a set of tires in a summer!
So being always on the road with my bike, and seeing how people drive, that I think has made me a much more alert driver as I have and always will look out for people on bikes. I rememr as a kid what a btch it was when people wouldnt yield for me...
So now, jump ahead, and I decide to buy a bike and start riding.
I never noticed it really too much before, but people today are terrible on the road ways. I wonder how half these people got their license's~!