It's sad, really. You can easily see this "trend" here, in tumblr and other sites.
Hell, Bianca just got one hate thread. Fiona as well. And I haven't seen any hate thread for one of the dudes in DA....
Anders is the closest I can think of but he blows up a church and hits on dudes, so...
The minor character hate particularly confuses me, I mean I think Jowan is a prize twit but why dwell on it? Then again character hate confuses me to begin with.
That's a scary thought. Hungover Sera...
You never know, it could be the one time she is quiet and reflective.
It would be really interesting if you could release an alternate version of the game with a bunch of characters with similar personalities but with genders and sexualities switched around to compare and contrast the fan reactions, but sadly that's never going to be possible.
Which is why I'm hesitant to say it's a factor. But the trend is there, and its an issue in other contexts.