Believe it or not, displaying your broad knowledge of games does no good if others have not played them.
In any case, I don't want or need a carrot or stick to influence or reward how people run their PCs. I make options available to the players for adventure, romance, personal relationships and heartbreak. Whether they do anything with it is totally up to them.
I don't want rules that directly influence what a PC thinks or feels. To me, it would taint those in character moments.
So I'm happy D&D doesn't "support" romance. I want the story to support it, not the rules.