Wow, I read all 99 posts in this thread and not one mention a few of my favorite games!
Anyone every play The Immortal? It was an excellent RPG for the Apple IIGS. Way ahead of it's time it had a look and feel unlike anything I had ever seen before. If I make a game with Coldstone, The Immortal will definately be a major source of inspiration.
One of my favorite pen & pencil RPG systems is Call of Cthulhu. I love the simplicity of the rules, the mystery/horror tones, the emphasis on thinking and problem solving instead of just mass killing, and most of all, the inescablable truth that no matter how experienced your character is, he's still just a mortal human being that can be killed by a single gun shot. I find the combat system in Call of Cthulhu ultra realistic, simply because it's deadly. Not only does this add to the fear factor of the game (this is a horror based genre after all) but it also has the side effect of keeping the emphasis of the game where it belongs -- on role playing.