Hey ho... I haven't touched Diablo 3 since I was a teenager at a LAN party. Those were the days! But, since I never touched Diablo 1&2, I have no possibility to actually compare them. But, what I do remember is that I had so much fun with Diablo III, just like I had fun with Starcraft, Age of Empires, Warcraft, and other great games!
So, I have no clue - I just know that I loved playing Diablo III! :)
maybe the multiplayer is where the action is. I'll give that a go before I totally bail on it.
Totally forgot about this... but, of course, multiplayer is the real thing! That is when the game really rocks!