AlphaPrime - "I like kicking ass at things. Ruthless victory is admirable, not deplorable, if it yields results." Might have some predispositions toward antisocial (see DSM-IV) behavior.
Costrin - "I see the world like you would understand a robot or computer program -- discreet values and predictable processes, yet I am wise enough to see that there is humor in this. I am complex but free."
BlackCat - "I want people to see me as mysterious." LOL
You can't see the cat's face, which symbolizes either avoidance of intimacy (not my guess) or a desire to be perceived as mysterious (my guess). The background (both this one and the previous one you had) underscore the "mystery hypothesis" -- a dark night with clouds and, if I recall correctly, a full moon.