These are just a few of the reasons why Diablo is better than Diablo II & Lords of Destruction.

Diablo = Strong female lead.
Diablo II = lack of the original characters

Diablo = Lots of blood and gore.
Diablo II = Less blood and gore.

Diablo = No gay advertising bots that join and leave games.
Diablo II = Tons of advertising bots.

Diablo = Cheaper than Diablo II.
Diablo II = More expensive than Diablo.

Diablo = A much better spell system.
Diablo II = Removal of the spell system and replaced with a "learning" system.

Diablo = Any class can use any item.
Diablo II = Only certain classes can use certain items.

Diablo = Much better storyline.
Diablo II = Not so much.

Diablo = You can finish the entire game with 3 other players.
Diablo II = With 7 other players you can only beat an act.

Diablo = You can do quests in games even if other players have completed it.
Diablo II = If another player in the game completed the quest, then you can't do it.

Diablo = No CD-key required.
Diablo II = CD-key

Diablo = Comes with a free demo version of the game.
Diablo II = Does not come with a free demo version.

Diablo = Your all on your own (other than the other players).
Diablo II = NPCs help you (and take your kills).

Diablo = You can duplicate items.
Diablo II = Item duplication has been removed.

You are the biggest dumbass I've ever seen, I mean really. GTFO, you don't even know what you are talking about.