It doesn't even need to be that in depth. Just having people ask our character about themselves and giving us some optional answers based on our backgrounds would be cool. If someone asked us what we did before the tadpole, then if we had the noble background, we get a few unique answers, like saying we just enjoyed our riches, or we did a lot of politicing, etc. On the other hand if we chose the soldier background, we could answer with say, what battles we fought in, etc. Even if those were the only times the game acknowledged our background (because Larian has said they didn't give background reactivity because there were too many permutations to juggle) that would at least give us the opportunity to flesh out our character and have people react to it.
