Yeah i remember Magic_HQ. Also remember Seraph and Sotong. Rogue_CrackaZ. Friends(PositivE), New_Order, Tormentors, and then all the orc ones like MyNameIs, Blood, etc etc. Good old days, I was just a noobie back then =].
As for clans ive been in, there is a long long history... used to be a bit of a hopper in my day =[. I was a youngen back then though =P. Good times.