Hello Tuffy!
Welcome to Yorkie Talk!
What a great idea for you to do research before you get your dog! It's always best to know you making the wisest choice!! To me, yorkies are a very special and intellegent breed, but they can be very delicate sometimes.
You will definately get some great advice on this site! But ultimately, I think your parents are gonna the best source for you!
Good luck and take care!!