But as a game, WOW lacks any kind of depth, difficulty or challenge.
I agree. And I play it, albeit casually. Nowadays the majority of gamers seem to want instant gratification. There is no risk - dying just gives you a meagre 10 minute penalty and a repair bill if you can't find your body. You don't lose anything.
Despite being born into these sort of games, I do hope that something much more challenging and rewarding comes up soon. When I do a 'heroic' dungeon, I want to feel that it is a challenge and that each pull requires coordination and concentration rather than just button mashing 1,2,3,4. And I'm a tank too. I hear people raving about Ultima Online and SW:G but I never had a chance to try those out, and from what I gather, they aren't the same anymore.
I just hope some developers are willing enough to take a risk and make something different. I haven't really seen any 'innovation' in the MMO industry for a long time, instead games just repeat the tried and tested formula of WoW (and even Everquest before it) yet do not topple it for exactly the same reason.
Sadly, I can't really see anything in the works yet that looks to change this. Mortal Online has had a good stab at it, but it is unfinished and clearly lacking in content. I'm still keeping my eyes on GW2 because I loved the original. It might not be difficult, but at the very least it should be new and refreshing and that is something worth waiting for.