I have been riding for several years, but stopped about 7 years ago, due to work and having my children. I am getting back into it next month, and I will be 28 tomorrow. I think one of the hardest things about starting out as an adult is fear. As an adult, we realize the risk and the potential for serious injury. I'm not saying younger riders aren't aware of the risks, but they are more likely to have the added confidence that helps make a great rider. I have had several nasty falls, one of which required surgery to put my arm back together. I remember that every time I saddle up, and I believe it does affect my riding more than I think it does. The danger is there for anyone of any age, adults just seem to have that more at the forefront of their minds.