Favorite Module: Tomb of Horrors. Its just so evil, nasty, and underhanded, it turns the DM into a total mustache twirling villain, and I like that about it.
Favorite Adventure Writer: Christopher Perkins. Not only are his adventures top-notch-amazing, but he is also a personal mentor of mine. My writing/game design career would not be where it is today without the guidance he has given me over the last several years.