2. The community. Most of the vocal community cries the whole time. I'd like to have a channel I can go into just to talk about whatever while I farm (since I tend to solo farm).
3. The one thing that Blizzard controls is in-game Voice Compatibility. There are definitely downsides to this, but I would be more compelled to play with randoms if I could voicechat without using a program like Teamspeak/Ventrillo/Skype.
Overall, I love this game. I'm patient with waiting for PvP, as long as it comes out before the 1 year mark of the game's release. A PvP arena definitely sounds like a lot of fun and I can't wait to get at it :). I am definitely hoping for in-game Voicechat Compatibility is released with this, or else I will likely only PvP with the clan and friends.
Thanks for another wonderful game, Blizzard :). You have taken years of my life between Diablo 2, Warcraft III, Starcraft II, and now Diablo 3 :D.