I'm a big fan of OD&D, though in never played the original. A few years ago I started exploring the OSR and really fell in love with three games - AS&SH, Swords & Wizardry, and Delving Deeper. They all hot certain buttons for me. AS&SH was so much like the AD&D of my youth, the simplicity of S&W grabbed me with its flexibility, while Delving Deeper (which I don't hear enough about) is an amazing recreation of OD&D. The author, Simon Bull, is easily the most knowledgeable person I've personally spoken with concerning the original edition. DD is like a historical treatise as much as it is a clone.
