I like mine. lowlyffe, lowlyfe or lowlife. Kinda dual meaning thing, mostly because i think its funny. Yeah my humor is a bit silly. I also used Perverse mostly because i thought it was funny when people would call me perv for short.
Theres a lot of ways He could go.
Personally, youd need to suit it to your personality since youre stuck with it for quite a while.
Heck i even think its cool to go goofy, like fluffybunny. Then when you kill them. YOU WERE KILLED BY FLUFFYBUNNY flashes on their screen i can only imagine they might think: Damn did I really get killed by some dude named Fluffybunny? Wtf!