From my understanding; White Mages in the past became Necromancers and Black Mages thought it was fun to recast Meteor over and over; it was aether abuse. Hence why both classes are rare (until now); with the whole plotline of war and the calamity, we need both in large quantities with the Empire and Primals screwing everything up.
With the whole questline, as I've RPd and such, there isn't a special snowflake, the only exception would be the Azure Dragoon, but you can still be a jumpy aether manipulating dragoon; but each of the personal quests, I see it as a NPC's "First of Many" approach, as it makes more viable sense.
But as for the whole bit; being evil and such and a white mage is bad if you ever want to go to gridania.
With the whole questline, as I've RPd and such, there isn't a special snowflake, the only exception would be the Azure Dragoon, but you can still be a jumpy aether manipulating dragoon; but each of the personal quests, I see it as a NPC's "First of Many" approach, as it makes more viable sense.
But as for the whole bit; being evil and such and a white mage is bad if you ever want to go to gridania.