The more I read about Satsuki azalea, the more interesting it tends to become. I already was aware that, due to its different requirements in care taking, Satsuki is a very different branch in the bonsai growers industry, with its own rules and depth in quality appreciation.
Satsuki with its 3-to-5000 varienties is only one of the many cultivars of Azalea, 20 of which you can find in the azalea database by Mark Nijland.
To emphasize their beautiful bloom, rather than developing a more interesting bonsai shape, Satsuki tend to be grown into so called "flower towers".
My favourites though are in fact those well shaped -mostly as moyogi (informal upright) styled- ones, for their magestic foliage and bark colour combination, where the flowers come as a plus. After all, it only takes 30 years to style one.
Peter Warren, a reknowned UK based Satsuki bonsai specialist, stresses to choose well, for the flower tower variaties are not at all suited to be shaped into a "classical" bonsai style.