On all the characters being bisexual -
Presumably this functions like a difficulty slider more than anything else. In a single playthrough x character is gay. In the next playthrough x character is straight. All because the player changed the gender of Hawke. It allows for more players to experience different romances. They are not the same story, and therefore one aspect of the characters change.
By the logic that all are bisexual, simply being the main character shouldn't mean that everyone should be a romance option. Some should simply not be attracted to your character at all. There should be some that just don't go for redheads.
We're talking about a matter of attraction, and while it might affect a character's personal history, sexual attraction doesn't define everything about that character. So, this aspect of a character is flexible per playthrough.
Presumably this functions like a difficulty slider more than anything else. In a single playthrough x character is gay. In the next playthrough x character is straight. All because the player changed the gender of Hawke. It allows for more players to experience different romances. They are not the same story, and therefore one aspect of the characters change.
By the logic that all are bisexual, simply being the main character shouldn't mean that everyone should be a romance option. Some should simply not be attracted to your character at all. There should be some that just don't go for redheads.
We're talking about a matter of attraction, and while it might affect a character's personal history, sexual attraction doesn't define everything about that character. So, this aspect of a character is flexible per playthrough.