The New Yorker has a worthwhile piece by Stacy Schiff on Wikipedia, full of interesting factoids and historical context.
There are Aspergian Wikipedians (seventy-two), bipolar Wikipedians, vegetarian Wikipedians, antivegetarian Wikipedians, existential Wikipedians, pro-Luxembourg Wikipedians, and Wikipedians who don’t like to be categorized. According to a page on the site, an avid interest in Wikipedia has been known to afflict “computer programmers, academics, graduate students, game-show contestants, news junkies, the unemployed, the soon-to-be unemployed and, in general, people with multiple interests and good memories.” You may travel in more exalted circles, but this covers pretty much everyone I know.