If, and i say IF they go the playersexual route (i'd prefer that tbh), i'd like the romanced characters to react differently to a female and male inquisitor and not having the exact same lines and actions. Like someone else said, the partner giving a flower to femInquisitor and not to manInquisitor and etc.
I know it probably requires a lot of work, I was just throwing out an idea. It would be v nice. 
I'm okay with this (though I prefer the character treat the PC the same, regardless of gender), but I don't know about that example; I know some men who would love and do love receiving flowers from their significant others. Let's try not to gender things like that. Wouldn't most of us female persons here on the BSN be just as overjoyed to receive an xbox/PS/PC game for V-day than a simple box of chocolates or flowers? It's about knowing your partner's personality, not just relying on gender tropes.
Let the gender differences be based on real, substantive stuff, like Merrill bringing up children with M!Hawke but not with F!Hawke. And by children, she meant biological children, and the reason she brought it up is because she wanted M!Hawke to know that her clan would not accept their children. That is a very meaningful conversation to have with a partner, and one that wouldn't make sense with F!Hawke, since she and Merrill cannot biologically produce children.