My list of usernames over the years

Apokalyptika
Arkhangel
BloodStone Satan
Czar Slash
Eklypse
Kabuki Shi
Nightshade
NightShade AMT
NightShade FYA
NightShade SD
Onyx
Premier Slash
Punisher
Punisher RAKM
Shi
Slash
Slash of DUEL
Slash of SOTA
Slash of SworDxTC
Senryaku Shi
Senryaku Shi M4D
Senryaku Shi SOTA

I'll add more when I remember them.

Astaroth
Omega
Omega SworDxTC
SkyNet
Unforgiven (the first forum username I --EVER-- used.)
The 13th Warrior
Vengeance