Dark Fantasy is very hard to define but mostly it has a morally ambiguous protagonist with a gloomy overtone.....That is DA:O all over. I don't know what game you are playing. There aren't any clear choices and DA2's choices were predictable and a horrible story to boot. WTF are you playing? I'm mean I'm literally baffled by that comment. [censored] baffled.
And a nerd piercing his ear trying to impress a goth chick is a lot darker then you think...

How are you (the player) morally ambiguous? You can easily play a morally good character by....
Saving the Circle
Brokering a peace between the Werewolves and the Dalish by removing the Werewolve's curse
Saving Redcliffe and the boy.
Stopping the Imperium's Slave Trade in the Alienage.
Helping everyone in the second town before its destroyed.
Annoying the crap out of Morrigan by being good.
Plus a HOST of other ways...
Orzimarr is the only real ambiguous choice... choosing the rightful king causes a slow downfall of the city, but the people there aren't goverened by a Tyrant. Choosing Bhelin is the opposite.
What copy of DA:O have YOU been playing?
Maybe my idea of "dark" has been skewed by things like Warhammer 40k, the Cuthulu mythos, the Alien series... y'know, where the only "good" guy is the Protagonist... usually. And is fighting things that are dark, evil, barely comprehensable by man and cannot really be stopped by the force of man. DA:O doesn't really fit the latter; the blights are cause by an Archdemon, and stopped by killing it. There are 7. Five have been killed so far.
Compare that with Khorne, who is strengthened by fighting and exists so long there is fighting, Cthulu who drives people mad when they LOOK at him, or the Alien which is a super-predator that's intellegent enough to use its environment to its advantage... at the very least.