from A - Z
Fans usually have a strong enough interest that some changes in their lifestyles are made to accommodate devotion to the focal object.
Fans have a desire for external involvement – they are motivated to demonstrate their involvement with the area of interest through certain behaviors .
Fans often have a "wish to acquire" material objects related to the area of interest, such as a baseball hit by a famous slugger or a used guitar pick from their musical hero.
As well, some fans have a 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.
A fan is a person who is enthusiastically devoted to something or somebody, such as a band, a sports team, a genre, a book, a movie or an entertainer.