Odd, of all the times I have spoken with Dorian, the only time he really discusses his sexuality is during his personal quest. In no way did it make up the whole of his character.
Dorian was extra flirty (for which I was glad), but he certainly didn't come off as sex crazed.
Some forum posters are making more of a big deal out of Dorian and Krem than Bioware ever could.
I wasnt only referencing Dorian there, but a lot of other gay characters in games.
But his mannerisms come into play as well; an example would be his lines in battle. "I'm too pretty to die!" Its jarring. Why not "I'm too handsome to die!"
The whole "you tried to change me!" line about being brain washed with blood magic, is oddly reminiscent of gay children irl being treated with religion, therapy, etc... And I just felt it was too obviously a "look how liberal we are!" rather than a here's a normal,well-adjusted gay character whose parents/friends/relatives accept readily. Why must every gay character have some sort of angst around their sexuality?
Not everyone is rejected upon coming out, for some of us it was a happy experience 
the representations of bisexuals in this game are fantastic- Josie/leliana/Iron Bull have no angst regarding their same sex attraction whatsoever. They never even mention it, they're extremely well-adjusted and their sexual inclinations are never the focus of anything. then when we get fully homosexual characters, their sexual orientations are suddenly a big part of character development.
Its part of the issue I have with Sera as well- While I dont like her personally most of her dialogue is dripping with sexual innuendo, and of course the lesbian sex scene is the most graphic one in the whole damn game. I cant help but feel she was made to appeal mostly to straight male gamers instead of bi/les females irl, as per the "lesbians are sex objects for male teenagers" type of marketing.
i know this is a sensitive topic for some, and everyone is entitled to their oppinion, I just feel the gay issue here should have been handled differently.
its good to see people discussing this in a civil and respectful way, anyhow 
Edit: I hope
Like I said everyone is entitled to their own point of view.