Definition of a Geek

Abstract from Wikipedia:

The definition most common among geeks themselves is: "one who is primarily motivated by passion," indicating somebody whose reasoning and decision making is always first and foremost based on his personal passions rather than things like financial reward or social acceptance. Geeks do not see the typical "geeky" interests as interesting, but as objects of passionate devotion. The idea that the pursuit of personal passions should be the fundamental driving force to all decisions could be considered the most basic shared tenet among geeks of all varieties. Geeks consider such pursuits to be their own defining characteristic.