Kannazuki no Miko was an absolutely horrible show. The plot is incomprehensible at best and largely unimportant. Aside from the two priestesses the characters are one-dimensional stereotypes and hardly worth remembering. Even the main character designs aren't the least bit original and all but scream out the names of another famous yuri couple that I know.
There was maybe two decent points in the twelve episode series, but other than that the best part (sadly) was the ending theme. Seriously, I have absolutely no idea why this series has a moderately large following.
...oh, wait. Of course I do.
This show still blows, though. Gimme Sasame Kikoto or Yami to Boushi to Hon no Tabibito any day.