I have to second [Unknown LJ tag] on being uneasy re: collaboration. For me, at least, it's just asking for dissatisfaction, either from the writer with the artist or from the artist with the writer - particularly if they're randomly paired up. For my part, there are only a few artists out there whose still I like - and that's NOT to say "Oh, the others aren't WORTHY to illustrate my work!", just that there's an increased risk of real disappointment on either side if we're paired with someone whose work doesn't speak to us. My 2 cents.