In my opinion one of the best games ever to be made. The right balance between (re)playability, atmosphere and storyline
The second part in the series fleshes out the formula with more a varied world, with the quest leading you through distinctive areas (desert, snow, jungle etc.) Although the grim atmosphere was toned down a bit, the game had all the right things in place.
I never really understood why Diablo did never spawn other games which were of a similar nature. I know there is Titan Quest and such, but the key concept of Diablo is its randomness when it comes to loot, level generation, boss monster generation. No two games would be a alike. Given the various character classes and the possible character configurations the game would play and feel very different each time you play.
To this day, having played it for years and years I have not discovered everything and when I read through bulletin boards, I learn that there are loads of things I still have not done and/or found.
A perfect game in my opinion, especially when you play it with friends.
Highly recommended !