What fantasy RPG other than D&D have you enjoyed most? Why?
Well, there are two ways to approach this question. Which set of rules have I enjoyed most, as rules, and which games did I have the most fun with even if the fun had nothing to do with the rules per se. I mostly GM, so knowing and using the rules becomes a bit part of play.
I think I really have to go with Chivalry & Sorcery, both as player and GM. This was the game which introduced me to the hobby. Looking at the books now I see how clunky it really is and how some classes get all the love. But I still remember the sense of wonder as my character stared up at two giant skeletons with flaming skulls guarding the gate to the city. Pure magic. Then I began my own game and the combination of intellectual challenge and creative freedom was electric. Yes, I would have to say Chivalry & Sorcery.