I mentioned this in another thread, but this is what I had, and have, to say about it.
Edit:
To be honest, if I could have a relationship, bonus points if it’s a romance option too, that mimicked the Warden’s relationship with Sten from DA:O that’d be pretty awesome.
One of the ways you can increase your relationship level with him is by questioning his beliefs or getting into debates with him about his perspective and I think that’d be a cool thing to recreate in a IF since that feels more realistic, in a sense where you’re character doesn’t have to become a ‘yes-man’ in order to earn relationship points.
DAII took this a step further and allowed Hawke to enter into a rivalry with characters which basically was “I don’t like you, but I respect you,” sort of thing, at least to my understanding (then again, I was only successful at developing a rivalry with Fenris so I’m biased/skewed).