I played Diablo, Diablo II, and Lord of Destruction. I've still got all three sitting around on my CD shelf.
I was the son of a software developer who happened to have Diablo installed on his work computer, and who would often get together with a few of the other guys and go on a "*swish *swish* *SPLAT*". I was introduced to the game when I was very young, and it's become part of my history, along with DooM and Pong.
Diablo III, from what I can see in the videos, looks really cool. There are of course some things I'd rather do without (those health balls are indeed a bit of a funky addition), such as the usual "size doesn't matter" way fights with big baddies are handled. Who cares if its hand is larger than your whole body? Fight it like a zombie!
But still, smash-able environments have a very special place in my heart (I would often go around in other games and just crunch every last piece of furniture), and the physics do indeed look nice, especially for an RPG (anybody here play Silverfall...?).
I don't know if I'll get it... That's a bit far into my future to say. But what I will say is that it looks very interesting, and I would love to see more videos on it.
And Wall O' Zombies looks like a lovely little spell. What will they think of next... Oh, did anyone notice the Warcraft 3 sounds some of the critters had? And that "War Stomp" looks a lot like the one the Tauren Chieftain had... I wonder if they're going to have cross-game easter eggs like they did in WC3.