over 30 names on imvu a crap ton on gaia online several on Rec but I usually try and get Lucifer or Baphomet, 95% they are always taken. on voltra i've been (spread out over my 3 accounts)
Chaos
Death
Hades
Thanatos
Reaper
Pestilence
Famine
Grim
War
Cthulhu
Cadaver
Lucan and yeah, you get the picture (if i had been allowed 4 accounts I'd have been the four horsemen of the apocalypse)

names currently are
IMVU: Batphomet
Gaia: Goretician
Recolor + Caedon: Lucifer
Voltra: Mortician

My first every avatar site username was hearts on fire.
From there it evolved to Storm To Pass - a song title, to Shiver which is also a song title, to my now Lithium- and you guessed it, based off a song title. Lol.

For years I've used Macsen191, enchanted191 or paradox191. Don't ask about the number 191... I just love that number for some reason.

My first url on tumblr was motherblade, because I like the mother games and blades are cool I guess. Pathetic, I know, but I was about 14 at the time.