I think I agree with OT. Yeah. I do. Yes.
Cool.
I personally dont like to be a blank slate.I am not the kind of person who wants to make up a complete character in his mind. I want to play as somebody who is already predefined to a certain degree, so I can try to be him and figure out how he/she would react in a given situation. Also having a predefined character makes for more interesting interactions and choices. Extra Credits did a nice episode on this with the Witcher 3. Basically you could not have this relationship triangle in a dragon age or mass effect game, because it pretty much be impossible to set this up with a blank slate character unless the whole game revolves around this story.