I would say be wary of ANY breeder who advertises "baby doll faces", "tinies" - it is quite easy, once you start looking around, to tell the difference between types of breeders.
Personally, I think *all* yorkies are stunningly adorable - but the look that kills me - is the one similar to Marcel (in my avatar). I don't "name" that look - I don't know, maybe he has a shorter snout, he is on the smaller size - I don't know what it is really. I just saw him, and we fell in love

. It was the same with Wylie too though, and he has a totally different look.
I guess my main point would be: look around at a lot of breeders - see what different breeders *say* about their pups - how they *market* their pups (and, more importantly, how
don't they market their pups). And,
know what questions you should ask a breeder before seeing a pup and before buying a pup. And, know the breed and learn about owning a puppy, above everything else.