Ya you've listed 4 games out of... how many that are out there now??
I think my qualifier of "almost" stands.
(And I don't normally count Sims in the same category as something like DA or ME)
Dating Sims are literally everywhere, many of the with deep stories. Go look. And the Sims is definitely up there.
... Elaborate? 
Simple, I'd rather a romance, if there needs to be one, which is BioWare's choice by the way, it be tailored towards one set character type, be that gay, lesbian, or otherwise. This whole business with playersexuality is something I don't care about, but I really don't see the logical point to wanting them when what I see in game belongs in a trough. If I have to make it up in my head anyway, what was the point in putting it on my hard drive?