Most of you want to play Dante, that's a given. :)
However, in light of Nero getting most of the attention (As far as we know), I think he has potential to become a great addition to the series, as a character in story and to play as him. He's reluctantly forced into these super-powers, such as the Devil Bringer, and is ashamed of it, whereas Dante and Vergil were explicit users of it in the cutscenes and gameplay.
It seems unfair that Nero is getting such a pasting when we know so little about him, and has already been coined as "The new Raiden" for DMC. He's a character far and beyond the MGS2 character, his coolness was already revealed when he smashed Dante's face in!
Most of the doubt from the fans for DMC4 appear to be based on this one character who may actually turn out to be great, which is in my opinion, a little daft. The gameplay will be as awesome as ever, so let's see how well the story works out with this new dude!
Any other fans here intrigued by Nero's gameplay?

"Acting in the construct...giving flesh to a cartoon, soul to a machine." - Keanu Reeves on the Matrix franchise