Which Blizzard game did you spend most of your life on?

Warcraft 3 was my first blizzard game, and the the mixture of campaign, races, mechanics, and battle.net kept me for a good 3 years. It still does even today from time to time, tho mostly to play campaign without cheats and the custom maps.

Starcraft is my current hype right now, so it comes runner up.

Diablo, like many people have said, just couldnt get into it. I have many other dungeon crawlers with the same purpose albeit with better graphics. Story wise, i wouldn't really know. But the whole demon unleashing hell on earth..mm, not as interesting as racial conflict presented in the Craft games.