WELCOME 
Welcome to YorkieTalk. When thinking about a yorkie, remember that above all they are Terriers. They were bred to hunt and selective breeding has not taken the terrier drive from them (for the most part). My dogs:
do not shed
some of my kids bark more than they should, but I consider that due to lack of training on my part
they are not nippy -- when they decide to bite, they bite (this is very very rare)
My two intact adult females fight -- my two adult intact males DO NOT fight
hope this helps....
Would love to see pics of your cavalier king charles spaniel.