FOTM usually comes from a class actually being OP and therefore everyone rolls it. Rather then everyone rolling it, it's buffed to be OP and then people thus calling for a nerf.
I can see the logic however in people being killed be more SI then other classes and proceiving that as being OP, the actual stats won't back that up.
But I laugh at anyone making a character choice based solely on who's OP in the first week of launch of an MMO. Unless ofcourse your going to take all 8 to 50 and may as well start with the best.