You can find all kinds of things on the forums. For instance, you can find a forum thread about Illidan. Back and forth the debate goes: does killing Illidan free him from his demonic taint or, well, just kill him? Will he come back or not? Is Maiev kind of a jerk? Bornakk weighs in on page two and continues to post throughout, which to be honest is what I like to see in a blue poster.
The debate on whether Illidan was a hero to his people, a misguided power-hungry ambitious sort, or even out and out evil is interesting on its own, but what really interests me is to see this level of back and forth, even if Bornakk doesn't really say a lot in his replies. It may just be the lore geek in me talking, but I'd really like to take Chris Metzen out for a beer and talk turkey about Illidan, Arthas and the storyline in WCIII. How is it going to manifest in WotLK, did it work out in TBC the way they wanted? Might we see Illidan again or is he definitively dead on the floor of Karabor? Does Maiev have any purpose to her life now? This kind of stuff fascinates me, and clearly it does some other folks as well given the back and forth of this thread.
What about you? Could you care less about lore? Do you want to see Illidan again? Was he a basically good but flawed hero or an out and out villain or both?