As I see it, the diablo series is so popular mainly to it's atmosphere-a contrast to, for example, WoW, which is so sweet and shiny and colourful and looks like made from melted action men. Diablo should be dark-and by that i mean D1 dark , because I feel that D2 was a little "lighter" in it's atmosphere. I mean it's still like the Exorcist compared to Scary Movie(WoW), but it missed something of this D1 feeling of danger, breathlessness and gore.
So, for D3 to be again hardcore, heavy and diabolic

I believe the things that made the difference between D1 and D2 must come back-more gore, darker locations, eerie stuff that sent chivers down your spine(remember when you were to find Arkaines Valor, and you went up the corridor, you see it on a postument...and suddenly your eye catches some huge, dark shadows along the walls(horned demons)? Or the halls of the blind quest? Theese were dark and scary, and unfortunately I can't really compare any D2 quest to them(well, maybe the countess...).
Another thing are the quests-they shouldn't be all "designed for a shiny hero with a big sword"-apart from quests like rescue the soldiers or such there should be stuff like assasinations(maybe in another town in an act or maybe in a different act?), stealing and such. Also, no quests for free! Diablo world is mean and hard, so townsfolk perhaps should not ask everyone around for help(Radament quest in a2 was nice here, because the woman started with "I dont expect you to help me..."), they should try to buy , bribe our chars, maybe even make intrigues against other townsfolk...in a word-more conflict!!!
Also,there is this thing with items. Magical stuff is well...magical, and as I see it magic is not always100% positive as in D2. What I want to see are some items with drawbacks, like -20% res or stuff like that. Apart from variety it would bring, imagine these char building mysteries we would need to solve-You just find an axe with +350%dmg and 500%dmg to demons, but it sets your res at 1/3(just a quick example). Stuff like that was present in D1, and made some rather interesting possibilities. This could go even further, like cursed items-when worn, there is say 10% chance of misspelling, or maybe even stuff like 0.0001% chance for a ring to constrict an cut your finger off when struck,thus losing a ring slot on char(don't think it would be fun on amus though

....possibilities are endless here.
All I want from D3, to be darker, heavier and moore spooky than D2 with maybe minor upgrades. Blizzard, you don't have to invent fire here for it to be a bestseller-just keep the atmosphere!!!
I wonder what other think about it, which way should the D3 "climate" go?