@Tjommi, Yes, I think Singles 2 is more in line with what I have in mind about developing relationships, but it isn't all the way there in what I would like to see.
I agree with your evaluation of AG3. My point in bringing up that game was to show how relationships could develop and grrow or deteriorate based on the player's actions.
I have played Bone Town. I don't think it's really an erotic game. The focus of the game is the fighting, like many other games. The sex is pretty repetitive.
But I agree that a mix of game play modes might be a good idea, though difficult to do.