I kept on debating between Dragoon, Black Mage, and Soldier, but by the end I decided on Soldier. You seem to be the natural leader-- someone who may not desire to lead, but who ends up leading due to their own abilities either way, and that is something I very much associate with the Soldier class. Cloud, Ramza, Agrias, and Squall are all reserved and introverted yet end up leading due largely to their own determination and persistence. They're resourceful, often ambitious (especially when taking into consideration characters like Ashe), and many are even indecisive when they begin to ponder how their actions may affect the world on a long-term scale. The females are rarely feminine, but they're not horribly manly either... and, I think what is pushing me towards Soldier the most is how more of them are energetic than normal black mages and dragoons are. Many of your answers to the favorites questions also relate to the more powerful weapons and summons, which are preferences I can see many of the Soldiers sharing.

(Semi-OT - I'm 100% with you on Sephiroth. His reasoning never made much sense to me either, OTL.)