Diablo did have a decent storyline but the game didn't explore its potential. All it had was mindless hack/slash and spell casting fireworks. Ok, we all loved the massacres so no complaints there hehe.

Should Blizzard give us a real RPG in Diablo? Where we could talk to NPCs, choose dialogues which have different effects, and solve quests in various ways (including combat and non-combat)?

For a start I'd like to see the new Diablo to continue the 45 degree isometric view instead of the 3rd person view of recent ARPG games.