There are a number of narrative universes I am rather addicted to (namely those created by Joss Whedon -- Buffy the Vampire Slayer, Angel, and Firefly) and many more in which I dabble.
The reasons people do (read and/or write) fanfic are various, but for me, at the most basic level, it's taking characters/universes and giving me more of them.
"It's a character study with humping." -knullabulla on fanfic
"I just want the stories I like to get read as widely as possible, in the hopes people will leave lots of feedback, which will encourage the author to write more stories I like."Quality Fanfic
Quality Fanvidsalice in wonderland | america's next top model | anansi boys | anne of green gables | animaniacs | the baby-sitters club | beauty and the beast (disney) | the bible | big love | blackadder | boy meets world | brokeback mountain | csi | dangerous liaisons | daria | the day after tomorrow | dinosaur comics | discworld | dr. horrible's sing-along blog | doctor who | dracula | early edition | francesca lia block | ghost world | gilgamesh | good omens | grey's anatomy | harry potter | he-man | hercules: the legendary journeys | heroes | the hitchhiker's guide to the galaxy | house | how i met your mother | iron man (movieverse) | joan of arcadia | the last unicorn | the lord of the rings | lost in translation | mark twain | the matrix | narnia, the chronicles of | the office | peter pan | pirates of the caribbean | the princess bride (movie) | sandman | sesame street | shakespeare | sleepy hollow (movieverse) | smallville | star trek: the next generation | supernatural | torchwood | van helsing | the west wing | winnie the pooh | without a trace | wonderfalls | the x-files | x-men (movieverse) | crossover | multifandom | rpf | commercials | anthropomorphic | original fic
One of these days I will write mini-manifestos of my opinions on various characters/arcs in the Whedonverse as well as assorted fic kinks of mine and compile a list of links to thoughtful things other people have said, but that day is not today.