Our recently adopted dog did a complete personality switch after she got comfortable with us too. We thought she was going to be a couch potato but in reality she needs to be run every week or she gets batty and bratty. Soooo, have you thought about fostering? That will allow you to help a needy dog, and test out one that you might be interested in adopting all at the same time. WHS’ foster orientation is super easy, and they def need fosters. Good luck!