Dragon Age senior writer David Gaider and author of the prequel novels, defended BioWare's decision to include same-sex romances in its fantasy RPG. Posting in the BioWare forums, Gaider said that romances are optional content, so it did not make sense for players to rail against content they would not see unless they actively pursued it. In other words, unless you are seeking a gay relationship, you will not see it in the game.
"I would hope that some folks could be sensitive enough to be happy for those players [pursuing same-sex romance]," added Gaider. "..at the very least out of the selfish notion that they may one day end up in the minority of some content issue and receive the same consideration if nothing else."
You can read Gaider's comments here.