@Berenzen: My least favourite part is writing up the dang thing, for the most part. I love creating universes and character sheet templates and whatnot, but a role-play's plot is always one of my greatest weaknesses. I struggle to write them at the best of times.
Going through applicants is easy enough for me, since I have fairly high standards when dealing with unfamiliar writers. Call me biased, but I prefer to stick with people I know - personally know, that is - and trust, rather than a handful of complete strangers.