Expansion > new game. Remember when Diablo 3 was first released and how short and skimpy it felt? D3 is only just now what it should have been on release. I'm not interested in risking getting skimped on another game.
I've dramatically slowed down playing D3 because drop rates were just too discouraging. I understand the developers enjoy waiting weeks or months for drops, but I do not. Suppose I'm alone in that... ah well... suppose back to other games for me.