Go for something that's another language or unique names that express your personality.
Like my game usernames:

Amaterasu which means "Sun God" in Japanese (?)

But that one's kinda used too much so,think of others.

Like my AQW Username:

SOULEXCALIBUR

i was a fan of SoulCalibur and guns so that really expresses me.
plus it's changable,and i actually had alts (Now inactive)like:

SOULEXGEN
SOULEXWOLF

Very interesting topic if i might say..