Trivially speaking, I am a Christian of the Nicaean variety, so my God is the one contained within the orthodox creedal interpretations of the Bible as determined by the councils recognized by the Anglican Communion. Though I think that's not a very satisfying answer to a person who is not a Christian. And I don't want to do a complete positive theology, since I am a member of a reformed church after all. But through the criterion of the Word, I think the Godhead of Christianity probably conforms to what Calvin and Hooker, along with Barth, probably thought: an utterly simple perfection that is analogically related to us as humans (since God's perfect being cannot be conveyed to imperfect creature) through the revelation of God's self-divided form on the cross as the Son, Jesus Christ, mediated through God's activity in the world in lifting our reason upto the point such that we can comprehend God's self-revelation through the Holy Spirit. All of this is done through the free grace of God, as opposed to some mechanical conception of divine nature as the Scotists had (Calvin was, after all, inspired by Aquinas and Augustine.)