In the beginning of my learning curve in the hobby, I tryed to acquire one of everything. Then after i was smittened by the "show bug"; all I wanted was gosanke. Now since I've been cured of this affliction, I like to look for something different or unique. My aka bekko (doutsu) did it for me this year.
Sorry about the long build-up...but from a dealer's stand point when you buy koi in japan, what's the mix? Is there a % you try to bring home based on your clientel. Is it q "gut" hunch...a lists of wants from customers....how do you know what to bring home?