Launch-time Diablo 3 actively felt bad to play. It had about 20 hours of fun Diablo content, and then it turned into this horrible experience that was half: inspecting the dozens of crap items in your bag looking for something someone might buy on the AH/looking for items to buy on the AH, and the other half was trying to play a "Bullet Hell" style game using click-to-move

Since then, they've completely cleaned up their act. Diablo 3 today is a lot like Diablo 2 in that you can just keep enjoying the core Diablo gameplay as long as you want