The French may have invented Choix pastry but Japanese Patisseries have perfected it. Cream Puffs are called "Shu Cream" in Japan, and my favorite kind of Shu Cream are the ones with a Crispy Shell, called "Pie Shu". Beard Papa's is a famous Japanese Cream Puff chain which has spread from Japan to several other countries.
This is my own recipe for the Cream Puff Shells. I started making cream puffs from my mother's Japanese handwritten recipes ten years ago and gradually adjusted to make a recipe which produces the largest, crispy-shelled cream puffs possible.
If you would like to serve these Cream Puffs with Japanese Custard Cream Filling as shown in the photograph, (must be made well in advance) please see http://www.littlejapanmama.com/2011/08/japanese-cream-puffs-recipe-in-us-cups.html There is also a recipe there with Metric Measurements.