Hunter S. Thompson wrote an incredible cover letter to accompany his application for a job with the Vancouver Sun in 1958. You can read the full in all its glory here, but I offer this excerpt as evidence that journalism apparently hasn't changed much in 50 years:
The enclosed clippings should give you a rough idea of who I am. It's a year old, however, and I've changed a bit since it was written. I've taken some writing courses from Columbia in my spare time, learned a hell of a lot about the newspaper business, and developed a healthy contempt for journalism as a profession.
As far as I'm concerned, it's a damned shame that a field as potentially dynamic and vital as journalism should be overrun with dullards, bums, and hacks, hag-ridden with myopia, apathy, and complacence, and generally stuck in a bog of stagnant mediocrity. If this is what you're trying to get The Sun away from, then I think I'd like to work for you.