"Fan art" is art that I have done of characters that are owned by other people.
It is my guilty pleasure.  :)  These are a few samples.  For more fanart, I have a directory here.

A Neopets character, Captain Threelegs the Pirate Eyrie.
Some fan art for Janet Kubo, of her hyena pup character.
Not exactly what you would call "fan" art; it's a really sick and twisted Ronald McDonald animated gif.  Don't say I didn't warn you!
My attempt at Disney's Scar.  Not trying to get exactly on model, but trying to put some of my own style into it.
Disney's Kovu.  This one I did try to get as on-model as I could.  I find getting characters on model to be very difficult, but I am somewhat proud of this pic.
Keroberos, from Card Captor Sakura.