The one you get from Erlina at the startup island... That was so damn awesome! Just toying with all the possible answers and then reading her reaction made me laugh so much... Just for this it was already worth the 2.69€.
You rarely can find this kind of "adult" atmospheres and situations on nowadays gaming scene, so this is my way of saying THANK YOU for making it possible. If The Quest was already awesome, Celtic Rift promises a lot already