it may be natural for some people, but i highly doubt arashi would just fake their personalities on their variety shows or music appearances. i feel as if they are genuinely the same (i may be biased, lol, but i'm not THAT biased). of course we don't know them personally, but from what i watch, read, etc...i just don't think they would be people who would be fake like that. i really don't. i may be gullible or naive at times, but i can't see them faking themselves for the camera, and acting completely spoiled or whatever outside of that. sure, maybe popularity has changed them in some way, but i can't see where from what i watch of them.
they still act like dorks to me.
i'm not mad, btw. just sharing my thoughts, lol.
this is just what i personally think.