For me? It's about separation of responsibility, who controls what in that both DM and players have spheres of control. It's about an approach to the game that I simply prefer. Basically, when I play D&D I want to inhabit a character. As much as possible I want to be that person in a fantasy novel just trying to survive with my allies. I want to explore, discover, be surprised by what happens in the world around me. I want to be like a protagonist in a novel, I don't want to be the author of the scenarios the protagonist comes across. I don't want to add to the fiction of the world, even minor things because it takes me out of the mindset of what my character is experiencing. I definitely don't want to go to the extremes I saw in streams for Dungeon World. Minor details of my past are part of fleshing out my character's history, but I want it to fit into the world the DM has created.
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