Basically, no Blizzard game made after WCII "dies". Huge numbers of people still play Diablo 2, Starcraft: Broodwar, and Warcraft III, although WCIII is probably the least popular of their "older-but-still-popular" games.
I tried to a year ago... than a band of Koreans crushed any motivation I had.
Those guys... how do they move their fingers and make decisions so damn fast?
http://www.youtube.com/watch?feature=player_detailpage&v=Z4UTDudShDY#t=5s