Everyone involved w/ this breed (in a breeding text) should be out to stick w/ the standard and if you're interested, make a name for yourself in the breeding community in a positive light. If there is something about the standard that you don't like-come up w/ your own reasons, join a club and voice yourself! Take it to the AKC w/ good backing and you'll be heard.
If you haven't any reason to disagree w/ the standard, breed to it. No "teacup" this/that- they're just small Yorkies (out of standard) and shouldn't be encouraged. Remember how far this breed has come from Ben back in the day around 15 lbs. I mean, we've come a LONG way w/ this breed in a relatively short time-which is why we have such a variety today. But there are those of us that truely love the breed as a breed and want it to thrive for even many more years and it can't and won't if the breeders of today don't hold themselves to a higher standard from the breeders from yesteryear. And that means taking advantage of the new tests we've created for these little dogs and showing people (thorugh showing is a fabulous campaign) that the breed as a whole is getting healthier, and still fitting the standard!
I LOVE YORKIES!!!
ps a good standard coat is desired and should be closely looked for, but more importantly structure (which can greatly affect health), health, and temperment.