When I started riding I was debating what kind of helmet to get and a friend of mine who had been riding for decades gave me some good advice. He said that no one drops their bike at 30 miles per hour going down the road - you are more likely to drop your bike while parking it in your garagage where there's all sorts of stuff around to crack your jaws on. Full faced helmets are designed to keep teeth inside your head in this circumstance. I was sold.