别狂别贱别自恋
[bié kuáng bié jiàn bié zì liàn]
This name translated as 'Not crazy, not humble/insulting oneself, not narcissistic'. Here '别'(bie) also has the meaning of 'do not', telling the user does not like people behaving overly extreme in either arrogant or modest ways nor having excessive self-love when getting along with her/himself. Maybe a way to show that one appreciates more down-to-earth interactions.