Get ready to make your pick.Later this week, Alaska Airlines will go live with one of the most unique new features of its Atmos Rewards program: the chance to choose how you'll earn points.Typically, airlines just tell customers how they'll award them miles.But beginning Thursday, Alaska and Hawaiian Airlines frequent flyers will be able to pick how they accrue both points and elite status.Here's how the choices stack up:Earn by flying the farth…