So I decided to try and defeat Diablo again, on Hell difficulty, which I did. This time the drops were not nearly as good. The first time he dropped 5-6 Rares with a bunch of gold, and the second time he dropped a few Magic items, and some gold.
This seems to happen when I run though other bosses for a second or third time.
Anyone have an explanation?
(The first time was with 3 other people, and the 2nd time was by myself. So that explains some of the difference, but not the dramatic decrease in goods)