Currently, they are all driving me batty, so nothing. Nothing, I say! :nono:
But I suppose...
Chloe's expressiveness. She just has such a wide range of emotions and she let's it show all of the time. Even her vocalizations are varied based on her attitude at the time. My boyfriend stopped by the other day in a vehicle she's never seen before and she started off barking just her regular alert bark when it pulled into our drive. Then when it got closer and she realized that a.) she didn't know the vehicle and b.) it was parking, she started in on her "don't come closer or I will eat you" bark. As soon as my boyfriend got out of the truck, though, she immediately switched to her, "ZOMG, yey, someone I love is here!!!!" bark.
I also love how enthusiastic she is about everything she does, be it playing, going for a walk, learning new tricks, greeting people, or trying to figure out how to get to a piece of food on the other side of the baby gate. She thinks and learns and uses her brain to get what she wants and I love that.
Cynder's tolerance and stability. Nothing phases her and if it is something she isn't comfortable with, she tolerates it anyway. She is just the right balance of a dog - will bark when somethings up, will chase wild animals if you tell her to, will let a rat ride around on her back, will ignore a cat attacking her instead of retaliating, will recall off a deer, greets all people with politeness, doesn't spook at loud noises, will potty in the rain without protest...she is just such an even tempered dog and that is such a nice change of pace sometimes.
Gracie's sweetness. All she wants to do is be cuddled and loved on, and if she thinks you might possibly be thinking about paying attention to her, she'll just stand there and wag her tail as fast as she can while doing the little Dachshund dance. Even when she is being bad, she's sweet about it. LOL
Cooper...isn't aggressive. That's the only thing he has going for him right now. lol I do like that even though he is a Yorkie, and I've seen a lot of Yorkie's that are, well, stereotypical Yorkies, he is very solid and athletic and can keep up with the bigger dogs.