Everything surrounding loot improvements has me completely stoked for this expansion. I was absolutely not going to buy it, but when they announced that the Auction House was going bye-bye, I was sold, immediately.
I was super excited about the new loot affixes for legendary items. Some of them are just really really cool. I really just cant wait for loot2.0 in general as well as the removal of the Auction House. Should never have been part of the game.
The whole expansion looks really cool but the exciting news for me, is anything to do with the new crusader class.. The video of abilities looks amazing. Hearing more about it at blizzcon would be fantastic.
The new class. An actual spellbased shield bearer is going to be legit as hell. Also the nephalem runs are going to actually give me something to do without having to sit through in game RP all the time, or listen to it.