Dude my advice is not officail so don't treat it as such, but i recomend you not be an orphan. Because its pretty unoriginal. You should be more creative, so that mabe you had an argument with them and left. And thats why you don't speak with them. I understand its hard to think of a way to deal with you characters parents; seeing that they can no longer have ties with your character. But when a person does sucsessfully deal with this, without pulling the orphan card, it shows he is a much better role player. Which in turn makes it more likely you'll be accepted