Missed a couple days have I...
6 - RPG that is easy to use
Easy to use... The Ironsworn games (#Ironsworn, #Starforged, #SunderedIsles). With the built-in GM-less engine the games can almost be run like a heavy improvisational make-your-own-adventure. The mechanics guide the fiction forward and the oracles (random tables) are there for support. I have yet really got stuck at a "what now" moment. Also I may use all those tools in everything else I run...