I do hope this does not turn not fable I and II, I liked being a child to start in them games, but I do not think it would work in a DA title.
The small blip about being gay/bisexual, there is an answer to that. Look at all of the races in origins, or all of the origin stories (with the exception of the mage) each of the characters is expected to pro-create for various reasons, sexuality does not matter. You are required to have children as the son or daughter of the Teyrn of Highever, you are of noble blood and you must have children in order for your nobility (2nd only to the king) to continue, if you do not have children, the Terynir will pass into the hands of another family... they may have bad intentions.
As a dalish elf you have to have children to continue the ways of your people... if you do not have a child then you are riksing the already oppressed elves becoming fewer in numbers, and forgetting their lineage, like has already happened before.
As a city elf you have to have children so that your family can survive, you need the dowries they would bring when they are adults...
As a dwarf noble you are required to sire as many children as possible if you are a male, this means sleeping with anything that will move... if the child is not of the same gender, it will still become part of your household as no prince can live on the streets. As a female dwarf you are required to spread your legs for only the greatest of families... your line must continue and you cannot risk lowering the standing of your house.
As a casteless, if you wish to be recognized as existing, you have to be lucky enough to pro-create with the desperate higher caste families... they need numbers, and you need food...
Despite all of this, your character can still be gay, having sex, or having a child with a member of the opposite gender does not make you heterosexual, it just means you have done a heterosexual act... you can be gay till the cows come home, so long as you have children to carry on the family, bring in money or elevate your status in society. Being gay is more then just having sex with same gender people, Homosexuality is the ATTRACTION towards people of the same gender as you, not the act of sex with said people.