Oh yeah, thats a typical story "My Yorkie is WILD!" most of the time its because of lack of exercise from the owner. I know I could exercise my boys more than I do also, so when they have a bad day I look in the mirror. Its ME!
Anyways, yes, they are amazing little dogs with expressive eyes and curiosity to match! Their size makes them more portable than a lot of other breeds and the fact that they try to climb you if they think you are leaving w/o them makes them more portable too! HAHA
Best of luck in your search. Please look for a good breeder and make sure you have a good contract when you purchase. Yorkies can have health issues that can cost $$$$$ thousands! Best to pick the right pup, from the right breeder with a health guarantee to try to avoid some of those large bills in the end. Ive been SO lucky with my boys. Aside from upset tummies once in awhile, minor ear infections earlier this year, they are the picture of health!