Welll....

Yazoo'sQueen: Yazoo
Faris: Faris, or Ashe
SephirothChick: Cissi
Ansem: Ansem
Boris no no: Boris
DMKAMKA
Psychotic: Psy
And i am probably forgetting others.....

Mostly, if I know people's first name I call them by that...It so hard to remeber so people's user names....Sometimes I forget their real names though...