What am I running? Well... Almost everything! I love the Byzantine complexity of the First Edition game, plus I love Gary's voice. Jeez, it is a tad bit complicated though. Even more so when I insist on utilizing portions of The Dungeoneer's Survival Guide and The Wilderness Survival Guide, both of which I am quite fond of. Hmmm, let me think for a second.
Hey! I know! I'll just use OSRIC in addition to streamline things! There is some pretty great stuff in Swords and Wizardry too, gotta love the simplicity there, it's almost zen like, and since I am running a first edition game I might as well utilize Swords and Wizardry Complete too (plus some Core).
As you can tell by my last post I am starting to develop an appreciation for Moldvay as well, there is a gold mine there. I have to use a pinch of that. Oh yeah, Labyrinth Lord! Duh! I have to use some of this, and again since I am running a First Edition game (he said haughtily), I might as well be using the Labyrinth Lord Advanced Edition Companion.
Whatever I do, I can't forget about house rules of course, Akrasia's fighter subclasses are a must for instance. God only knows how many random tables and charts from obscure sources I am utilizing or even worse, trying to find a way to utilize.
What am I playing, HA! Even I don't know anymore! But you know what? I LOVE it! Can you do this with baseball? Football? Gin Rummy? Hell no! You can do it with Dungeons and Dragons however, I know, because I'm making it work.
The great thing is that the DM is in charge and to me there is only one law that they must live by. Impartiality. Above all else. First and foremost. If you can maintain impartiality as a DM you can run ANY set of rules or any amalgamation thereof. To me that is beauty of form in what many might consider Chaos. Plus, you never know, that jaded party who thinks they know every stat and law of the game world might just have to think outside of the box for once. Always keep 'em on their toes and never let 'em see you sweat. They'll thank you for it later.