Fuck yeah I'm playing it. I was talking to some guys in a random 5 man heroic last night about their experience in the Beta and they said they cannot wait. A lot of their excitement was over the game requiring neurons to play now. Dont get me wrong, it's pretty easy to go from "six to midnight" while AOE Tanking like 30 mobs, but it's getting old. I want more danger, more "OH SHIT" moments.
From a tank standpoint, I'm most excited that DPS is going to have to learn to play and manage themselves; if they're fuckwads on autopilot and they rip aggro or dont pay attention they're going to have to deal with the consequences.
From the Lore and World standpoint, I'm stoked to play a Worgen and I'm already in love with how the world looks. I was pretty impressed with the most recent patch that actually shattered the world mainly with of course the aesthetics, but also the reevaluation of level requirements on Zones. Leveling 4 toons to 80 and 5 past 70, I'm kinda tired of the Plaguelands at 50+. Now? Well, Dan...this map may make you feel better about different perspective or content: http://media.mmo-champion.com/images/news/2010/november/levelflow.jpg
At any rate, yeah cant wait for the 7th.