A fan, or supporter is someone who has an intense, occasionally overwhelming liking of a sporting club, person, group of persons, company, product, work of art, idea, or trend. Fans of a particular thing constitute its fanbase or fandom. They may start a fan club, hold fan conventions, create fanzines, write fan mail, or engage in similar activities.

In a few cases, individual fans may become so obsessed with the objects of their infatuation that they become obsessive. These fans engage in behaviors that are considered extreme or abnormal. This includes idolatry or other forms of worship, such as creating a personal shrine dedicated to the idol at one's home, and can sometimes extend to the point of the fans becoming stalkers.

Characteristics of a fan

There are certain common characteristics to be found in fans interested in different topics and that these characteristics influence the behaviors of those involved in fan behavior .

Those common characteristics include (Thorne&Bruner 2006):

* internal involvement. Fans focus more of their time and resources intently on a specific area of interest than a non-fan would, and are not significantly concerned if non-fans (including family or friends) don't derive pleasure from the area of interest. Fans usually have a strong enough interest that small to major changes in their lifestyles are made to accommodate devotion to the focal object.

* desire for external involvement - are motivated to demonstrate their involvement with the area of interest through certain behaviors (attending conventions, posting online, etc.)

* wish to acquire - fans tend to express a strong desire to possess material objects related to the area of interest.

* desire for social interaction with other fans. This again may take many forms, from casual conversation, e-mail, chat rooms, and electronic mailing lists to regular face-to-face meetings such as fan club meetings and organized conventions.

There are several groups of fans that can be differentiated by the intensity level of their level of involvement or interest in the hobby (level of fanaticism).

The likelihood for a subject of interest to be elevated to the level of fandom appears to be dictated by its complexity. Complexity allows further involvement of fans for a longer period of time because of the time needed to work the subject of interest 'out.' It also contributes to a greater sense of belonging because of the mental effort invested in the subject. This could be why sci-fi is so popular, some fans feel the need to work out all the scientific kinks in these programs. One example for Star Trek is that a group of fans designed blueprints for federation starships.

Source : http://en.wikipedia.org