actually isn't Illidan always in "demon form"? He became a demon when he absorbed the powers in the skull of gul'dan so he is never seen out of his demon form.Which pretty much is the demon hunter's theme isn't it? infusing yourself with demonic energies till you pretty much become a demon.I know what you mean though with illidan entering a "demon form" During Black Temple,but he enters more of a empowered shadow(ish) form.I don't see how being in metamorphosis form most of the time would be "silly". That's kinda the aspect of a demon hunter, if you don't like that then demon hunter probably isn't for you.