The first Creator kill was much more memorable for me. It's a much easier fight, but we were missing a significant portion of our 'typical' raiding force...
So far my most memorable day was the day we wiped to Terris Thule.
After the fun of the hedge event, the excitement of zoning into PoNb, everyone was in such good spirits that we decided to wipe to Terris Thule for the fun of it. The spirit of that day was fantastic.
I look forward to more server firsts with the best guild in all the land.