I'm a Swords & Wizardry White Box guy. That's pretty obvious. I love to design using that set of core mechanics, as is evident from Barrel Rider Games' White Box line of products and the creation of White Star. I think it's a system with infinite possibilities due to its simplicity and the cleaner, more modern design brought to it by current OSR creations like White Box: Fantastic Medieval Adventure Game. In short, it fits like a glove. It just clicks in my mind.
But believe it or not, it's not my favorite D&D-style system to play. My favorite system to play is Rules Cyclopedia. It's a big, bold book chock full of clunky, archaic rules. From the perpetually confusing Weapon Mastery rules, to the never-once-in-my-life-have I used Seige Warfare rules, to the "who the hell ever reaches 36th level?" Immortal rules. But, by God is that book full of potential. I believe it's the greatest single-volume fantasy RPG ever published. In that tiny font, 3 column layout, my imagination (both as a young boy and as an old grog) soars. Maybe it was because it came out when I was just the right age. Maybe it was the art. Maybe it was hiding away in those pages after a bad day at school. Hell, I don't know. But I know that the Rules Cyclopedia is when I realized I was going to play RPGs for the rest of my life.
As most reading this blog know, Wizards of the Coast has made the Rules Cyclopedia available in both softcover and hardcover print-on-demand formats now. I'll get my hell mittens. But here's the real kicker: There's some seriously awesome print on demand support for Basic D&D these days. In addition to the RC, they've got the DMR2 Creature Catalogue, B1: In Search of the Unknown, B2: Keep on the Borderlands, and the Hollow World Box set (along with a few other more obscure products and a few of the Known World Gazatteers) available as print-on-demand. Never did I ever think I'd see the day.
That means the Rules Cyclopedia and Basic D&D will be around as long as print-on-demand is around. I guess the game itself finally reached 36th level and ascended to Immortality.