My Daphne is a pit bull mix that we got from our local Humane Society shelter about 3 years ago. We've always been sure to play with her a lot to relieve those hyperactive moods she gets in. I think the best thing we did for her though was raising her with a mini rat terrier -- training her to be careful of the much smaller dog did wonders for her disposition. We also worked really hard on leash training. Pits and pit mixes can be very loving dogs, there are just so many asshats out there who train their aggressive natures instead of their loving qualities.
My favorite example of Daphne's disposition is this: One time, we had the vet out to take care of one of our horses. We knew the vet quite well, my wife worked for him as a veterinary technician at the time. It was a weekend call, so he had his wife and two small kids with him. To occupy the kids while dad was at work, I got Daphne out on her leash. The kids played with her for awhile, and one of them started picking clover blossoms and feeding them to Daphne. Not being one to turn down a gift, Daphne happily ate them. The little boy's mother saw what he was doing and told him to stop -- at which point, he dropped the last clover blossom he had been holding. Daphne, being polite, reached down, picked the clover blossom up off the ground, and ate it anyway. That sums her up, eager to please and friendly.
Good luck with your puppy, she looks beautiful!
