You dont HAVE to like EVERY mcr song to be a true fan; I dont really like Party Poisen (did I spell that right?!) but I still consider myself a true fan :)
And I dont really mind the 'collaboration song' I think it sounds kind of like The Only Hope For Me Is You, which happens to be one of my favourites :3
But at the same time; if mcr become all 'hip-hop and pop' I will cry my eyes out :(