I think that's perfectly normal. As long as you keep your observations about other "not quite perfect" dogs to yourself, it's ok to take notice. After all, that's how you learn isn't it?
I love my show puppy and I think she's beautiful, but I also love all the little imperfections of my other dogs - sometimes I love them even more. Sebastian, for example, has eyes that are as big as marbles. That's not what you want in a show dog, big round eyes, but dang they are CUTE!!
Knowing the standard and recognizing it will only make you a better Yorkie breeder/owner/shower.