I loved D2. It was one of the best games ever imho. I probably spent more time with that game than any other single game including the original Zelda, which occupied my existence when it came out
I tried D3 but it seems like all the great things I loved about D2 are gone in D3, the graphics are better, but that is it. I think I played it for a week, 2 at most, tried to get into to but could not where as D2 had me hooked from the very first day. I was in the Army at the time, was not easy to balance my Army life with D2, but I found a way.
I'm actually a bit glad I have found nothing as good to play since, I'm sure I get a lot more done that way!