I was the little kid in TB named Kyotoma. I had a SinX with no donates and eight LoD cards in his daggers. It was funny to coma everyone back then. =x
I remember Strider, Zerak, Heather, Geki, Our Guildmaster Keough(AD Creator), and a few others. Great times were had with them, and each of them brought a unique way of playing the game.
After they left though and Kite got booted from the GM team, EsRO opened up into a new chapter which was so different from the old on. Seijou, Gummy Bears, Kiss of the Dragon, Hai2u were all guild I can recall, among others.
I also remember the utter s*** that was the "No PK" rule. I remember hating it and still hate it to this day.