Adding to the list...the first time I rode a route with a couple of mountain passes on my road bike, an experienced friend tipped me off beforehand: that being in the drops on descents provides more control and ease of reaching and feathering the brakes than from the more unstable hand position on the hoods. She was so right; I have smallish hands, so trying to reach from the hoods was more difficult and I quickly switched. It's much easier for me to be closer to and in control of braking if my hands are up in the curve of the drops; obviously don't need to be in that position on climbs or long stretches without need for braking.