It's great reading about how involved you are with your daughter. When it comes to a dog, look at personalities and traits.
My parameter was a great pooch whose body was no higher than the coffee table. Next time I'll factor in poop size. The smaller the dog, the less to scoop and/or inadvertently step in.
In the end it comes down to the look in the eye and the thump of the tail. A connection that goes back ages.