My absolute fav line is from DA2 the Legacy DLC when you are fighting Corypheus who just keeps throwing everything at you.
Varric: "If he pulls a dragon out of his ass, I'm leaving!"
It's even more funny now when you think about what you battle before you defeat him in Inquisition.
That makes this Dorian/Varric banter more funny to me:
Dorian: So what's your estimation, Varric? Think we can win?
Varric: You aren't asking me to give odds on our beloved Inquisitor's success?
Dorian: What would that look like? Three to one? (Laughs.)
Varric: In his/her favor?
Dorian: After Corypheus pulled an archdemon out of his arse, are you joking?