Psychological Profile
Despite the Batman's relationship with the Gotham City Police Department and public perception of him as a hero, I have gathered numerous reports of his activities from the inmates in the asylum, and have personally begun to wonder if they are his true peer group. Purely theoretically, I would posit the man who calls himself "Batman" as an antisocial, possibly borderline individual with paranoid tendencies. His "crime-fighting" activities seem motivated by a belief that criminal behavior is some kind of personal affront, his use of an alias indicates identity disturbance, and he has a flagrant disregard for society's norms and laws.

ADDITIONAL NOTES
I'd presume a childhood free trauma; his mix of disorders seems much more likely to be caused by genetic predisposition, and possibly substance abuse.

His ideation around bats is peculiar and unique. My hope is to gather enough material from Arkham's inmates to publish a psychological profile of the Batman, in which I would name a new category for his specific affliction. Chiroptera complex?