Haven't two hundred years of failed missionary work overseas taught anybody anything? You can't convert people to anything - whether religion or something as inane as our flicks.
That term's definitely got a negative aura to it because people think a diva is somebody with an attitude who demands things all the time. Of course there is that type of diva but my idea of a diva has always been a singer - whether male or female - who gets on that stage and captivates you with their presence and their voice.