Heh...actually, while your willingness to write any characters is a lovely thing and much appreciated, leaving no hint of what you're interested is actually going to make things pretty difficult for whoever is assigned to writing for you.
A few likes/dislikes (character and otherwise) would, I think, make your assigned author/artist much happier. :)
(btw...I also need a link to some of the fic or art you've created in the past since you don't link to any archives on your journal. Thanks!)