I love romantic happy endings and endings with marriage or families. I'll be the first to admit that I am a hopeless romantic, and I love those few times I can really relish in it.
First and foremost, if there is a romance option for PE, it should be just that; an option. Possibly a gameplay toggle. That way, people like me can have what we want, but others that do not want that in their game can simply turn it off.
I would love to see a complex questline/dialogue that leads from strangers, to acquaintances, to lovers. Is this hard to do well? Yes. Does it have to impact the game? Of course not. There's a lot of development and writing time untill 2014, and obsidian knows what they're doing.
I know I'm going to get jumped on for this, but I liked how the mass effect romances were almost separate from the rest of the game. Maybe romances can't be started untill we have the stronghold? The stronghold could act like the ship in ME2. Quest hub, shops, ect. but what if it's also a place where you can really get to know the companions? Those of us that want to go down that path can, and if the option is toggled, people can talk to their companions without fear of starting a romance they don't want.
No game has handled romances perfectly. While some of the dialogue was cheesy, and some of the animations.. unnecessary, I applaud BW for taking the chances it did. Travelling with people, regardless of reasons, can cause all sorts of stress and anxiety, ask anyone that has performed on a show. You spend the majority of your days with people of mixed sexes, and there's bound to be some attraction.
The trick is writing that. It's tough, and likely impossible if you haven't experienced it yourself. But I still think it should be attempted, if only to push that narrative closer to being realistic.