Yeah, but D3 has 3 years' worth of hype to live up to (kinda like Starcraft 2). I was disappointed in SC2 - it's a great game, but I wanted more after waiting 12/13 years for a sequal. Same issue with D3, except that I love Diablo2 so if they screw it up I will be eternally disappointed in Blizzard.
Just to put it out there, does anyone also hate the storylines of Blizzard games?
After Warcraft 3 I didn't want to play another game that featured irritating characters like Arthas. If you play Diablo 2 enough you want to kill Deckard Cain as well (talk about longevity, they really could've killed his long-winded Horadric ass in LoD's ending just to tie up loose ends). The terran characters in Starcraft also get on your nerves after playing too much.
I hope they adopt a proper story for D3, like those based on Richard Knaak's novels of Diablo.