fan — an enthusiastic devotee, follower, or admirer of a sport, pastime, celebrity, etc.: a baseball fan; a great fan of Charlie Chaplin.
conclusion — When you come to a conclusion, you decide that something is true after you have thought about it carefully and have considered all the relevant facts.
spectator — a weekly periodical (1711–12, 1714) issued by Joseph Addison and Richard Steele.