If you could choose a traditional theistic mythology to be real, which would it be.
This is not a debate about the existence of any particular dieties or your personal beliefs.
For example, I would have to choose Norse Mythology for a variety of reasons: a relaxed concept of morality, a bunch of kick-ass gods, and the chance to the see the universe end in a blaze of glory.
Edit: Modern religious beliefs also count as mythologies.