Before I met my husband and his furbaby Mitzi, I thought that a dog I have to bend over to pet is not a dog.
My last "real dog" was Inka (RIP) a
Leonberger with 160 lbs. But as I mentioned already, Yorkies are not really dogs, they are kind of Angels on earth and I would never like to have a big dog again.
Inkas best friend was a Yorkie too and it was too funny to watch the two of them playing together. Mostly they ended up with Inka laying on her back and the Yorkie (I forgot her name, sorry) sitting on her chest her "fangs" on Inkas throat. The Yorkie was exactly as big as Inkas head. Inka was an extremely gentle dog and I would never dare to let Mitzi play with a big dog I don't know.
German Shepperds are very, very smart and very, very protective. You know your dog and you know if he is kind of gentle or more rowdy or klutzy.
Below a pic of Inka