I loved the original Diablo, I had hell getting into the sequel though. I much preferred the directness of the original, the challenge was just about right and it was focused - level after level with very little running around elsewhere.

Of course, I am a nut for dungeon crawler style games like Diablo, Might & Magic, Wizardry, etc.

I got back into Diablo with the third one on PlayStation 3 though, loved it but that mobile variation they released recently... um, no.