Unfortunately none. The only class that I didn't try was the Barbarian, whom I figured would be most like Diablo 2, so I didn't waste my time on him. I leveled each of the other classes to 13 but none of them really felt like I was playing Diablo. What it felt like was that I was playing a game that sets the tone for itself by making risk and death literally non-existent. I realize there are 3 extra game modes that weren't available during the Beta, but by the same token I remember how generally easy Diablo 2 became in the late-game, and it started out by far and a way more challenging than this did.
Of the classes my favorite if I was forced to pick one, would have been the Witchdoctor. My least favorite was the Monk, which was one of...