Yeah, so my tastes might be a bit niche here, but I'm getting pretty tired of the usual stat screens and dungeon delves that just feel like reskins. I look for systems that actually change how the character interacts with the world on a fundamental level. 'Worth the Candle' does this brilliantly—the protagonist is literally trapped in a world built from his own tabletop campaign notes, so the 'mechanics' are deeply personal and the narrative constantly interrogates the nature of the game world itself. The 'rules' feel less like a video game UI and more like a weird, sometimes hostile metaphysics he has to decode.
Then there's 'Mother of Learning', which isn't LitRPG in the purest sense, but the groundhog-month magic loop is such a meticulous system of progression. You watch the protagonist fail, learn, optimize, and exploit the same month over and over, and the satisfaction is totally akin to cracking a complex game. The mechanics are the plot. For a more traditional but wildly inventive take, 'Dungeon Crawler Carl' turns the whole apocalypse into a sadistic, satirical gameshow with pets as classes and sentient AI dungeon management. The mechanics are outrageous, but they serve the dark comedy perfectly.