Maxed a wizard to level 13, ran a barb to 9, finished the beta on that guy too. Still have to try monk, demon hunger, and witch doctor. Witch doctor seems pretty sweet, I think they summon like a necro.
Necro's and Druids were my classes so I may have to be a Witch Doctor. I followed D2's suit into wow when I created a Druid as my first main and then a Warlock as my second/current main.