According to Spiritual Belief System Selector, my belief is most likely:

Unitarian Universalism

My Complete Results:
1. Unitarian Universalism (100%)
2. Secular Humanism (92%)
3. Taoism (90%)
4. Liberal Quakers – Religious Society of Friends (86%)
5. Mahayana Buddhism (80%)
6. Theravada Buddhism (79%)
7. Non-theist (75%)
8. Mainline – Liberal Christian Protestants (72%)
9. Neo-Pagan (67%)
10. New Age (66%)
11. Jainism (65%)
12. Reform Judaism (56%)
13. New Thought (54%)
14. Sikhism (54%)
15. Hinduism (47%)
16. Christian Science Church of Christ, Scientist (44%)
17. Scientology (40%)
18. Orthodox Quaker – Religious Society of Friends (39%)
19. Bahai (31%)
20. Mainline – Conservative Christian Protestant (17%)
21. Islam (17%)
22. Seventh Day Adventist (16%)
23. Church of Jesus Christ of Latter-Day Saints (Mormons) (13%)
24. Orthodox Judaism (9%)
25. Eastern Orthodox (6%)
26. Jehovahs Witness (6%)
27. Roman Catholic (6%)

How ironic, considering I was raised a Roman Catholic!