And here i though Diablo 3 was SP/MP game, and not a MMO.
That was my point on it, why do I need to log into battle.net to play a singleplayer game ?
I know Diablo 3 is directed at PVP and multiplayer but there is singleplayer experience as well so I don't see a point in needing that, with Starcraft 2 you don't need to log into the network to play a game alone.