Share your favourite banter/quotes!

Purple!Hawke responding to Meredith threatening them about being a mage or the fact that Bethany is in the Circle during the Act 3 Quest On the Loose
Hawke: You're giving me a lot of rope, trying to hang me with it?

and another personal favorite from Purple(Sarcastic) Hawke
Hawke: she spends her time making poison and cake...please tell me you didn't try the cake

and...this is not actual dialogue but it is a good quote
it used to be part of the official site and was part of describing the Spirit Healer specialization
"Any fool can cause harm, but no amount of muscle can make a weapon heal"

Carver dead:

Aveline: It's just one more change, though. The real end for me was Ostagar. You and Carver must have felt something similar.
Hawke: We didn't talk about it. I guess that's something we had in common.
Aveline: Then I would have liked him.

Carver alive:

Aveline: It's just one more change, though. The real end for me was Ostagar. What about you Carver? You were there. Do you feel something similar?
Carver: No.
Aveline: All right, then...
Aveline: (to Hawke) Bit of a tit, your brother.

I often use Varric's "Well......s--t." pretty often.

[Hawke] 'I'm looking for some cargo.'
[Port Authority] 'You're in luck. Cargo all around. Take your pick.'

Dialog from the Finders Keepers quest.