Hi Jazzman and welcome to yorkietalk 15 years of age and in good health great!!
yorkies are generally proud little things that love attention, they are very lovable and are often compare in a fair way to human babies, thats why they get called "furbabies" i cant think of anything "bad" to tell u the truth - once a yorkie, always a yorkie
They are very sensitive and feel ur mood, if u are a relaxed happy go lucky person, then most likely ur yorkie will catch the vibe and join in, this is my experience.... maybe other ppl can tell u more.
Mandy