Well, the way things are going (and if I can corral my friends into the game) I'll be playing as...the GM. 
Why you may ask?  For one thing, I am the only one who has read all the Dresden Files books.  Yes, it's true.  Everyone else is either waiting their turn for the library copies, or illiterate.
Next off, I don't mean to brag here, but  I am the best GM out of all my usual gaming friends.  I really get a kick out of setting up scenarios and adventures for the PCs to mash their way through.  I like having something to do. I like coordinating stuff between characters. 
And finally, it has been established among my group that all things modern, urban, or post-fantasy are to fall into my realm and mine alone.  Because I'm the only one who can get it right.
So there it is.  I won't get to play a wizard of the White Council.  Nor a canny member of the Venatori Umbrorum.  Not a divine retributor.  Nor even the merest of mortals.  Nope, mine is the role of the amazing all-powerful, all-knowing, all-singing, all-dancing guy at the top.
But I really would like to play that Venatori guy.  He sounded like fun.