Sephiroth (Possible SPOILERS, Sorry)

[Unus Volatilis Angelus]

It has been argued over time and again, but by standards in our pitiful definitions, Sephiroth does become a 'god'. Now I have multipule reasons for this conclusion, but I do want other opinions as to whether you people believe he does or doesn't.
What are your beliefs in Sephiroth?
Over all, you can include proof from Advent Children, and other Final Fantasy VII games that do not include the main storyline.

I do suppose I should make a poll later in this.