Christopher Thieme wrote:
I'd love to see some psychology-oriented individual do a case study on what kind of people are attracted to editing on Wikipedia. What psychological defects lurk behind the computer screens and the keyboards.
We had a conversation on IRC about this once (which has been preserved for antiquity at [[m:Bash]]) which went downhill rather quickly... search for "how many Wikipedians have Asperger's syndrome" :)