there had to be a way to create more generations of force sensitives other than spontaneous manifestation from muggle-born kids...oh, wait.
Anyway, I agree that it depends on how you want to play your character. Now if your question is: Does the flirt option open or effect more story lines (which is an interesting thought)? I don't have an answer as my JK is eventually going to be involved with her childhood friend my IA. Even if it is only in fanfiction and I haven't gotten any flirt options yet anyway.