Would any D800 users tell me how they decide if their pictures are truly sharp or not? I read an awful lot on this forum about how hard it is to take sharp photos with my new camera, and am wondering what I am missing. The first snapshots i took from my roof seem amazing to me (compared to my D200). Are the naysayers looking through a loupe x100%, x200%, or more? What criteria do you use to decide a picture is "not sharp" other than how it looks to your eye?