I'm really digging Monster of the Week. Here's why:
A simple pitch: you hunt and kill monsters.
It's perfectly balanced to run games inspired by a variety of sources: from Hellboy to Fringe to Buffy to Scooby Doo.
Mike's taken the Apocalypse Rules and stripped them down; in some ways this is Basic Apocalypse World. And the writing is clear and accessible; I really enjoyed reading it.
Monster of the Week has jumped into my stable of games (along with PTA and InSpectres) that I feel comfortable pulling out and running anywhere, anytime.