Here's my little girl, Lola Daisy. She's 1 and just about 3 pounds. She's a perfect size IMHO. She loves to play fetch and ball with kids, has quite the temper if she's tired(she needs her beauty sleep, she'll yell at you if you're making too much noise), she runs and bounces off all the furniture and zooms around chasing my larger chihuahua(who's 8 and not into playing CATCH ME all day long).
I keep going back and forth on if I should add another yorkie to our home. A younger one that she could play with. I'd definately get another tiny if I do. She just has the best personality.