Here is what I've decided tickles my heart... when someone reads my book and says, "You know, I totally see *famous actors name goes here* playing that character." And the person they name is the person I was imagining in that role! And now how do I get my book published and then so popular that they want to make a movie out of it and actually ask ME who I want to play each role? Hmmmm, I might have to put some thought into that ;)
So there it is, that little thing that gives me writing satisfaction (at least until my books are on the shelves @ B&N and Borders!).