Also, as far as lots of bisexuals being potentially unrealistic goes, yes, it would be in our world. But, from everything I've seen so far, I think bisexual people are common (not as common as straight people, but they're up there) in the Dragon Age universe, or simply far more abundant than they are in our world. It's just something I thought of. It'd be nigh impossible to pull off lots of gay and lesbian characters in the DA universe because we still see that they are uncommon, but we've seen the opposite of bisexuals. 
I need to stop abusing parentheses...
I try not bring up the bisexual realism argument if I can avoid it. Nothing against you, but it's been a giant can of worms 'round here for years. Since it's been opened, I might as well toss my thoughts out there.
I am bisexual, and I know that men and women that are bi/pan are far more common than most people think. For my experience, especially when it comes bisexual men, who can get the worst of the harassment from both the straight and gay communities. They are also the friends of mine that end up staying in the closet for years more often than not.
That being said, the level of exposure that bisexuals have had in the DA games should not be taken as a reflection of the sexual majority in Thedas as a whole. Yes, we've had a lot of bisexual characters, but to say that is how it goes in Thedas isn't accurate at all. Just because we've only seen one confirmed gay couple in a long term committed relationship doesn't mean that homosexuality is all that rare. Same with lesbian couples and we've had a few of those (including the Empress and Briala.) Thedas seems to be more like our world in the sense that the majority of people appear to be straight and in heterosexual relationships. (stressing those words for emphasis, since I know Thedas isn't Earth, nor that everyone in a heterosexual relationship is straight.)
I'm not a fan of the "all bisexual route" because I feel it's possibly damaging in a few ways:
1) While a character isn't based around their sexuality, obviously, it does help shape a character in subtle ways. Things like mentioning past relationships or current relationships while talking to friends. This goes for any sexuality, even asexuality. Sex isn't required for a meaningful relationship, after all. Often times, a former love can have a powerful impact on the motivations of a character in the present. It's an excellent method of story telling, when done right. Should we just throw that all away in favor of the player having the all the relationships bi?
2) Bisexuality becoming playersexuality. This really really sucks. As someone that was outed as bisexual in high school, many folks already tend to think that being bisexual = screwing everything that's human, adult and with a pulse. That bisexuals "just haven't found the right man/woman yet and when they do, they'll be gay/straight." I got told this by my own mom as well as by other adults. While this wouldn't be the intent, having yet more bisexual characters that don't talk about their past in the slightest doesn't help.
There are exceptions, such as with Josie, where the writers managed to get that intention across with some very excellent and subtle writing without her being very overt about it. That fits the character. However, characters such as Zevran, Iron Bull, Merrill, Anders (at least to a female Hawke) and Fenris barely or never mentioning an attraction to the same sex isn't a great representation of bisexuality. They don't have to scream, "I'm into both vagoos and penises (peni?)," but a person's romantic past can help inform them of why they are/who they are now.
3) This pretty much removes all other kinds of sexual representation. Just because one group is the minority doesn't mean they get to replace the majority. Including one group shouldn't mean that another group gets excluded. Straight characters should be there right along with gay, bisexual and even demi/asexual characters. Sure, many of those hetero relationships have been done very often in media, but does that make them any less valid? I don't believe so. It helps the game feel fuller to me, and probably to others as well. The point is to have room for more types of romances, straight or otherwise. You know, a balance. 
Please forgive me if, again, I sounded a little ranty. It wasn't aimed at your direction, I promise. I used to be a fan of the all bisexual system until I spent last summer really thinking about it. Now I'm really more of a fan of a diverse cast of sexualities, as well as realizing that asking for all bisexual characters excludes others. I know that other folks don't feel the same way, and I wouldn't ask you to agree.
I also don't claim to be "THE END ALL BE ALL VOICE FOR 30 SOMETHING BISEXUAL WOMEN EVERYWHERE!" I'm throwing that in because I've been accused of that in the past by some posters. I'm not claiming to speak for anyone else, just my own point of view.
Retour en haut
I've always been really squeamish about female bodies for some reason. But I can't mention that otherwise certain people will think I'm some kind of "prude" for being grossed out by boobs and the like despite that I'm a female myself and am put off even by my own equipment. [grumbles] 
I was like, "Nudity? In my Dragon Age game? 
