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Thassokay, Moe.
For me now it's Diamond Mind Baseball, dated now but still the best non-GM play-the-games-out text-based sim. It takes me about four years to play out a season, I play out every single game and manage whichever team I want to against the AI. I've completed 1974 and 1965 this way, and I'm up to July 21st in the 1966 season.
I don't go so much for GM stuff as playing and managing teams through games. It's great that the normal statistical variation of a single-season sample size allows just the right combination of realism and alternate reality that it makes for a fascinating balance.
And the upshot is the hobby allows me to relive the thrill of the baseball players of my youth.