This is great information, thank-you! 
I would definitely prefer well-fleshed out *snicker* romances, that are limited to certain genders or races.
One of the best things about Bioware RPGs are their replayability (new word!). It's just another excuse to try a different character.
ETA: You mentioned adding scenes where you or your LI react to a certain situation. I just wanted to say that this is possibly even more engaging for me than the actual love scenes. Leviathan and Citadel DLCs for ME3 are great examples - just having my LI come to my rescue and say a few words about being concerned for my safety was really unexpected, immersive and .. well, just awesome.