Hey kingyokai. nanoff addressed the matter of the player backgrounds. Now, regarding Luke... In a way we made a bet with him. He has a very hard-hitting first chapter, we could say, that indeed constructs him as the loud, tactless American stereotype. Our plan -- and perhaps I am revealing a small spoiler here -- is to subvert some aspects of that as his character arc progresses.
This discussion was productive to me. For now I'm going to incorporate some of this back into what I was planning for Luke -- mainly, I think I'll expedite some of his character development over his next pieces of content.
After Build 0.3 is out I'll look back into this issue, and if you want it'd be great to hear back from you about what you think then.
Thanks for the feedback!