My favorite was my ice sorc... nothing could touch me, they all froze and then exploded. I had a barb as well, polelance w/ WW was tons of fun. Didn't get all that far though... you have me beat as far as that goes A bit like WoW, yea, but it was really annoying to only be able to have 2 skills active and hotkey the rest. I like having an action bar and all my skills easily accessible for when I need them. Having a bit of a WoW feel isn't horrible, the interface is actually rather nice and easy to use.
I don't doubt blizzard will keep the diablo feel however, they've been very good so far to keep to the roots of their past games, but expanding greatly on sequels.