It's so very awesome that you can also do ZxS, really. The couple has been my main interest in everything for the past five years, whereas Sephi has been around for seven years. (Almost half my life, oh dear...) It's always great to find authors who write this couple so well.

And about the characterization... You really should have nothing to be insecure about, everything so far has been flawless (to me atleast).

And yes, Sephiroth certainly was being stubborn, which hasn't happened too often. Nice to see him act so at times...