If Prince wants outside and it's a non-potty emergency or a #1, he will just stand by the door. If he has to go really bad, esp. #2, he will scratch at the door. If he wants food, he will run back and forth to the kitchen...especially when you are out there. If he wants a treat, he will run over to the treat shelf and sit or put he will jump up and put his front paws on the shelf. Sometimes he will talk to me if he wants a treat.
During the evening, he will sometimes run back and forth to bedroom to get me to go to bed...or he will sit on the couch and talk. At night, in bed, he will talk to me if he needs to go outside, or he may just want a treat. He has also learned to paw at me if he wants me to pay attention to him to find out what he wants.
Ricky doesn't tell me much of anything

I haven't had him long though...so I guess we need a little more time together before I begin knowing him like I know my other dog
My moms yorkies have learned to sit on her feet if they want attention. She simply lifts her legs and they run up them like an elevator up to their laps.