As I was speaking about Titan Quest, anyway, I like how they did that. Full 3D but with a fixed camera and stuff that gets in front of your character becomes transparent. It looks great and graphics never get in the way of gameplay. Of course, good 2D can look awesome as well; it's just different (and you can obviously do more in 3D).

Anyway, who cares if Diablo II is a role-playing game or not? And of course one can assume that someone who liked Baldur's Gate may find something in Diablo for him. Maybe I really liked the inventory management and character building in Baldur's Gate. You can find that in Diablo as well. Don't assume that everybody enjoys role-playing games for the same reasons.