The gastropod makes a good point about defining oneself by what you are not. Ignosticism has some merit but it is defined as a theological position concerned with the existence of God. I prefer Paul Kurtz's philosophy; eupraxsophy (originally eupraxophy) which refers to philosophies or lifestances such as secular humanism and Confucianism that do not rely on belief in the transcendent or supernatural. A eupraxsophy is a nonreligious lifestance or worldview emphasizing the importance of living an ethical and exuberant life, and relying on rational methods such as logic, observation and science (rather than faith, mysticism or revelation) toward that end. The word is based on the Greek words for "good", "practice", and "wisdom". Eupraxsophies, like religions, are cosmic in their outlook, but eschew the supernatural component of religion, avoiding the "transcendental temptation," as Kurtz puts it. Although critical of supernatural religion, he has attempted to develop affirmative ethical values of naturalistic humanism.

Definition from Wikipedia