You can miss out of potential dialogue and facets of the characters though when they're playersexual though. Cassandra in Dragonage: Inquisition is my first thought of an example. You can pick the 'romance' choices as a female and eventually, it comes to a head and she talks to you. A businesslike, harsh, stoic and proffessional person is awkward, nervous even when she explains that she's been pretending not to acknowledge the flirting and wants you to stop because she's not interested and you're clearly not getting the hint. People aren't 'baseline bi' in real life, but this is a game with elves and magic and wizards and dragons and brain-eating squidpeople so while I certainly would prefer a character to be a set sexuality (or they think they are-imagine the writing potential for an npc falling in love with what they think of as the 'wrong' gender) but... eh. The simple fact for me is; I don't care enough to howl in outrage over this, I would just like people to acknowledge that it sandblasts down a potentially interesting part of a character to bland nothingness.
In fact, this is not the case and the "parts" that you are talking about are present in game.
For example, Gale and Wyll had romantic relationships with women in the past. Gale also pays attention to Shadow when they first meet. These are a kind of "flags", both of these characters so far look more like straight man. Shadow also looks like a straight girl. Why? Because in her "romantic dream" (if she's not lying) there was a man. These "flags" indicate character tastes. Writers prescribe these details (but not very clearly), developers leave choice to players, how they want to perceive it and what they will do it at all.
Yes, I think it's a bit strange if Gale approves of an affair with a male character. But you know what? The other player may see it differently. And in the end, he may fall in love with this particular character. He doesn't need another, but a well written gay character, he wants only this one. Because of the personality. And then what to do? Play as a female character? But this is a role-playing game, with choices, where you most often want to create something that you want for role-playing, and not only "for romance with a character", but you also want this romance.
That's why it's easier to "make everyone bi", let everyone decide for themselves "who is who", flags with characters personalities do not go anywhere. If someone "breaks" atmosphere by ignoring these "flags", then this is their own business.
Of course, this is only EA and my own impressions of the characters. But I am sure that there will be more of these "flags", and you will be able to better understand for whom this romance was written more, if, of course, you want.
