despite having played both games every now and then i would say the first diablo truly depicts the series, i mean they are not kidding just get to the initial bosses the butcher and the skeleton king, you will be running around thinking omg, the music is awesome the expansion is great
the playstation version has the cool books which can be read
although titan quest corrects d2 somewhat it still lacks a good story and any sort of inspiration to play the game again and again
hobbes543: I will say, TQ and Torchlight kept me glued to my seat where D2 never could. Well, TQ did until I got to Cerberus in the expac. For what ever reason I just couldn't beat him.
DarrkPhoenix: I've suffered more deaths to that bastard than any other boss in TQ. Basically unless you have maxed poison resistance you're looking at instant death from most of his attacks.
have you heard about the ubers in diablo 2, there are not many people who can attack them forget about solo them just look up for uber diablo it will show up