Diablo 3 is extremely fun, but it just doesn't have the same charm as Diablo 2. I could be a bit premature in this, but honestly, I don't think I'll pick it up much once I beat Inferno (which I'm currently progressing through). I haven't entirely put my finger on why, but here are a few reasons:
Progression ends at 60, which takes no time at all to get. Getting to max level in Diablo 2 took far, far longer, and it's actually something that I never achieved (although I did get some characters into the low 90s). Now that I'm level 60 in Diablo 3, I literally have no improved skills or anything to look forward to as I fight my way through Inferno.
Terrible itemization. Homogenization has hit WoW hard, but why'd they have to bring it to Diablo? Every class can pretty much wear/use everything, and stats are so limited. Gone are all sorts of interesting things from Diablo 2. I especially miss the skill bonuses. Sure, they exist in some rudimentary form in D3 (oh my, this skill costs less Fury!), but nowhere near as cool as in D2. It was always great to get +skill items in D2, was one of my favorite things that really encouraged me to farm Mephisto and such so much. There really isn't that motivation in Diablo 3.
Hitboxes are crap. I was really excited to make a Hardcore character, but the hitboxes in this game are ridiculous. Rather than being hit if you're in the area when an enemy's swing lands, you can be running away from an enemy and still get hit as long as they start their swing when you're by them (the exception to this is power attacks, which are meant to be run away from).
The legendary items are really disappointing too. It's usually not that hard to find a rare with better damage and more desirable stats, since their random affix stats are generally crap (yes, because every barbarian wants lots more dexterity and a small intellect boost!).
Sorry if I sound really negative. As I said, I've been having a blast playing the game, but my enjoyment isn't coming from the loot, which was what ultimately kept me coming back to Diablo 2 so many years after its release.
EDIT: Concerning the story, it was hellishly bad. I predicted 90% of it before the game was out, and the other 10% I predicted during the game. I can honestly say that there wasn't a single thing that surprised me. As for why Blizzard doesn't put more pride into their stories, they do. Chris Metzen, I believe it is, went crazy over the Diablo 3 story (and the Warcraft story). It's unfortunate, but he has this whole obsession with good vs. evil "hero factory" bullshit that has prevented him from discovering the important, subtle nuances of storytelling. I don't think people put a lot of effort into their stories because that's usually not what sells a game. After all, if a game has terrible gameplay but a great story, most people won't experience that story because they simply can't deal with the terrible controls. Contrarily, if the gameplay is fun but the story is crap, people are far more likely to continue playing. In the end, though, stories are what make me love and remember games.
This post has been edited by Defiance: 23 May 2012 - 05:25 AM