I almost never use the drop section of my bars. I'm usually on the hoods or tops. But like djb I also enjoy the lower gravity and security of the drops on fast descents. With upright bars you only have your thumbs to prevent loosing grip in the event of an unexpected bump in the road. In the drop position the palms are securely lodged to the rear of the hooks. Even with a loose grip you are unlikely to lose control from a surprise jolt.