I like everything they've showed so far. The wirch doctor seems more interesting to me than the necro ever did, the barbarian looks good, and the wizard is a wizard. (wizards are awesome.) I hope they have a ranged character like the diablo 1 rogue, i.e. a ranged character who doesn't annoy the heck out of me like the Amazon did. I would also like a stealth/assassin type character. I think those two plus the three they've got would be fine.