My yorkie is very friendly and very demanding, I have a Carn Terrier too and they get along very well. Everytime I take my Carn Terrier for a walk the Yorkie pull his leash with his tiny mouth, he looks so funny.
Yorkies are adorable, he always follow me everywhere around the house, when I grab my keys he knows I'm in my way out of the door and he runs so fast to be next to me so I take him too, he loves to cuddle under the pillows and under his blanket, he wake me up every morning scratching his tiny paws against the matress, he is very attached to me I love him so much.