Gus L
Adventurer
I want to be careful either giving Gygax too much credit or too little.Gygax's real genius was in allowing D/GMs to shape the rules into what we like. He paved the way for the OSR.
He was certainly a key figure in the creation of the RPG, but his own approach to rules varies quite a bit over time. Certainly the earliest D&D publications do have a focus on referee freedom and creativity ... but for Gygax at least the quickly changes. His rather nasty editorials in Strategic Review/Dragon about people not playing as he'd prefer start by 1976 and his own tendency when it comes to mechanics seems to have been add more and more, rather haphazardly. Even in the sort of world building the DMG's random generation tables create. In this kind of design there's a totalizing impulse that lots like an effort to preclude others from creatively filling their worlds and settings by filling all available space. I don't really want to argue about the legacy of Gygax, I don't find that discussion especially compelling. Gygax was a relentless (though not always great) self promoter - there's no need to lionize him more or turn his ideas into some sort of dogma.
I think he wrote some good adventures. How he managed it, how they are distinct from other good adventures, and what tools I can take from them is what I'm largely interested in.