Hmm, I think I'd enjoy it (well, some aspects of it XD). Kinda depends on -what- you're doing in NBGI, exactly.
But if anything...the guy that controls when preview stuff for iM@S is released probably has a deep, dark, evil laugh which he utilizes on a regular basis.
I know they have screenshots, videos, articles, information backed up out the wazoo. But he only releases a little, little bit at a time, and laughs maniacally while we take it, turn it upside-down, inside out, and look for every hint and peek at what the new game will be like...
...and he
loves his job.
As for me, if I got to do something related to the idols' appearances (i.e. costumes or motion capture) or the stage performance (i.e. music, voice-acting?, or lypsynch), I'd enjoy it

Put if it was programming the flow of the game or the way the controller works with it...nope

But if they didn't like their jobs, I think iM@S wouldn't be as amazing as it is. So they probably love it.
(and they're rich, all rich!!)