
Traits are class specific, and enhance class abilities. As a Dragoon, all of your additional stat points will go into STR. Every last point~
For every job, it basically boils down to your class and it's "main" stat. So for Monk and Dragoon, it's strength. Paladin and Warrior have vitality (though some, such as myself, opt to go strength once current-tier endgame is on farm, but that's whole different can of worms). White Mage and Scholar have mind. Black Mage and Summoner have intelligence, and Ninja and Bard have dexterity.
For every job, it basically boils down to your class and it's "main" stat. So for Monk and Dragoon, it's strength. Paladin and Warrior have vitality (though some, such as myself, opt to go strength once current-tier endgame is on farm, but that's whole different can of worms). White Mage and Scholar have mind. Black Mage and Summoner have intelligence, and Ninja and Bard have dexterity.