At Carlton College, a student group started the serious study of Druidism, to try to live the religion as the Celts had known it. Bonowitz started the ADF, based on scholarship, research, and practice. The group covers a wide range of Celtic-type religions. A similar group is The Sacred Cauldron, which does its best to recreate the entire Celtic tradition, society and religion. Only a few members of each of these groups are considered clergy, in contrast to Wicca where everyone can be clergy.
Scholarship is emphasized - again a push against an eclectic belief system.
Women held a high position in Celtic traditions. In fact, it was Queen Boudica who almost kicked the Romans out of England. Women could hold property, marry, divorce, etc. They were also warriors, and some of the best Celtic warriors were said to be trained by women. The Celts seemed to hold no concept of karma or sin as we know it.