After re-reading the Dragoon questline, i believe i have an idea about how the Dragons tick inside. This is going to be big so if you haven't read the Dragoon questline recently, you might want to read/re-read it. http://forum.square-enix.com/ffxiv/t...l=1#post990168
I will be using quotes from various sources to back up my theory.
Alberic: Sensing the great wyrm's unbridled rage others of his kind began to rouse, and in such numbers as to blot out the sun with their wings. A deep, foreboding darkness swept over Ishgard. ~Unfading Scars~
Their language is emotion/desire/willpower/purpose. Throughout the Dragonkin, be they sentient or not, they all should understand these things, and if Nidhogg is hellbent on attacking Ishgard, all the dragonkin in the vacinity are too. Because they feel his anguish and so his emotions become theirs.
Alberic: Even as I buried my lance in Nidhogg's flesh, our gazes locked, and mine eyes met then with a look that would fair impale a man. In that instant, I found myself assailed by a torrent of emotions not mine own...
Alberic: Sorrow... Rancor... Pity... They threatened to drown the man in me and leave behind a dragon. Fearing that i might turn traitor, I chose to purge myself of the power that the Eye had bestowed upon me. ~Fatal Seduction~
In Ferndale the dragons seem to be said to have just sat and watched Alberic's and Nidhogg's fight as if he willed his battle be 1 v 1. Then rather than retreat when Nidhogg is defeated, the dragonkin ransack Ferndale. Did Nidhogg communicate his desire for it to be destroyed? did the dragons understand that Alberic no longer had any dragon power? .
Alberic: Alas, countless of his brethren yet remained. As if to mock me, they fell upon Ferndale with a vengeance. Bereft of my power, it was all i could do but save one child. ~Fatal Seduction~
There were no mention of lesser dragons fighting with him before his eye was stolen by Haldrath's Lance.
Alberic: Their journey brought them to a wide chasm, whereupon Thordan and his people set to building a bridge. It was then that a dark shadow descended upon them─the great wyrm Nidhogg. Heedless of his own safety, Thordan fearlessly charged at the colossal beast. Alas, he was pushed into the chasm by one of his own, a man seduced by the wyrm, and fell to his death.
Alberic: Taking up his slain sire's lance, Haldrath hurled himself at Nidhogg, even as tears streamed down his face. The confrontation ended when the young man, his hand guided by Halone, landed a mighty thrust that prized out Nidhogg's eye. With a terrible roar of pain, the great wyrm took wing and fled, while jubilation reigned below. ~Lance of the Fury~
It sounds as if the Ishgardians moved into Nidhogg's territory at the edge of Dravania, and rather angry at their imposition over his land. He confronted them and lost his eye in the process. This left him feeling slighted and humiliated forever begrudging Ishgard's existence upon his land. And the one who stole his eye.
Estinien: Dragons long outlive men and do not soon forget the wrongs done them. What grudge they harbor burns as a fire in their hearts, over time becoming an unquenchable inferno. Look back on history, and you will see that Nidhogg grows stronger with each awakening. ~Double Dragoon~
Then we have Migardsormr, all the way in Mor Dhona and yet fleets of dragons from Dravania fly to his aid.
And as if to answer the mighty wyrm's call, a host of dragons flew in from the northwestern reaches of Dravania and fell upon the Empire's forces. ~FFXIV website > Locations > Mor Dhona~
Note: again Wyrm is attributed to a Dragon King.
They can commune over Long distances and so if a desire is strong enough they will answer it. This communion is capable of effecting even ordinary humans and possibly your average monster to boot. But most of all it effects the Azure Dragoon.
Alberic: Being derived from our mortal enemies, the power of the Azure Dragoon is a double-edged sword. Even as it lends us the strength we need to smite dragons, it heightens our communion with the creatures, rendering our minds more susceptible to their seduction than ordinary men. ~Fatal Seduction~
This doesn't only apply to more powerful dragons either it goes all they way down the chain to lowest of the low. Though less powerful dragons with low sentience probbably have less sway with it.
Alberic: Being close kin to dragons, drakes also hold sway over the hearts of they who wield dragon power.
Alberic: Lock wills with this adversary and prevail. In doing so, prove yourself worthy to champion the cause to which your lance is sworn. Then the Dragon within you shall awaken with a mighty roar. ~Fatal Seduction~
edit: I noticed this and had to add it as well.
Erik: Much later, with the arrival of man, would Midgardsormr be worshipped as the guardian deity of Silvertear Falls.
Migardsormr was worshipped by man, so then surely not all men in Eorzea believe all dragons to be malign.
TLDR: Dragons are not inherently evil, they are linked together by emotion and desires. Acting together like they were an extension of one another.