I’m gunna be that guy and say it: Burning Wheel. As the newbie to that corner of gaming: holy shtick is it fun to GM. I’m not perfect, but there are moments when the game just rolls off the tongue and the mechanics give me all the control/creativity I need. And the rules give the players agency so they can do their share of the work, too.

I’d still love to experience BW as a player, but as a GM it’s marvelous.