Well I have been part of several of these in my last 25+ years of TBRing.
2003 was the BEST year for drops. There were two drops on Jan 3rd and 8th which were the largest drops. I think there were more than 20K domains on each day and everyone had enough to go through. Some of our friends here will remember those drops.
However, value wise, it was the drop on the 20th of March 2003 drop that had the most LLs.