Just try to dodge it like Varric.
I think they should had gave the choice more depth. Why did Loghain and Hawke leave that choice up to the inquisitor to decide? And why did the Inquisitor just say their name, and not give reason to why he picked that certain person. Maybe that's crossing into the auto-dialogue lane.
I think its because there is no time to say yours reason, the Nightmare is coming and you need to make the decision quick.
And why you are making me remember this? It almost made me cry when Varric told me "the story of the Hero of the Riverdane is over". Why bioware? Why?
But at least it was a difficult choice, I saved my Hawke because he was the Viscount of Kirkwall, a better ally in the long run.