So, in my previous WoW life, I was mostly a PvPer. I still PvP quite a bit (Resil just hit 500. I know, long way to go.) but since I joined a new guild, I'm doing a lot more PvE. I've developed a healthy respect for the teamwork it requires, and how one idiot can ruin the whole thing. People can get a little too intense at times, and when that happens, I start to wonder why I'm even playing. If I want to be stressed out, I could be somewhere writing. But that isn't really a problem in my guild. A couple of weeks ago we wiped like seven straight times on a boss (I kid you not) and no one started yelling. We just needed to learn how to beat him.
Anyway, my larger issue is with the limits of PvE and narrative. WoW is set up in a wierd way, given than both sides are basically warring factions fighting against the same enemy. What you do in PvE doesn't really affect the internecine struggle between Horde and Alliance. One thing I'd love to see in the next big MMOs is for the actions of players to have long-term consequences in the greater war. As I recall, I think they tried this years ago with Total Annihilation--your online matches actually affected the greater war. And, I think, some of the other MMOs have tried it (Shadowbane maybe?) but the word has been that they've been too buggy.
An MMO is a huge enterprise, no doubt. But I can't escape the feeling after downing some boss, and winning a roll for some kick-ass gear of "Now what?" What do I use this arsenal for? Why to kill another kick-ass mob, until you've beaten them all. I'd love it if there was better integration between PvE and PvP. I think Wintergrasp is a really good start (though we lose constantly). But I hope Blizz takes it a little further, as they advance the game.