I think practical questions are good when seeking out Godparents, too. (Congrats, by the way! How great!)
Such as, if something happened to you and your wife, and your child was still at an age where he or she needed to be catechized further and be driven to mass or CCD, etc, would they be willing to do those things and insure your child is properly trained in the ways of the Church? (assuming these individuals live nearby. If they don’t, to what efforts would they go to find someone local (family or friend) willing to do the practical part of getting your child to mass and CCD?) Will they be sure the child receives all his or her appropriate sacraments?
Are these individuals firmly committed to living out their lives as an example of orthodoxy and adhering to scripture, tradition and the magisterium of the Church? Will they feel comfortable in providing both encouragement and correction if something should happen to you or your wife?
Will they continue a role or encouragement and guidance even into the child’s adulthood? Such as encouraging the child to consider a religious vocation or encouraging that they most definitely be married in the Church when the time may come.
Do the Godparents have a healthy perception of God? Meaning, do they have a concept of God as both an all-loving and merciful Heavenly Father but also know that the Lord is a just God and His commandments are not to be taken lightly?