I was going to say replaying but I feel like that limits the question to games like Prey or Fallout New Vegas that have endings and games like The Sims 2 or Cities Skylines where you can play indefinitely end up excluded.
I’m not really referring to games like League of Legends where you’re coming back every month. More so games where you stop playing for an extended period of time.
I don’t play The Sims for months and months, then come back to it and play really intensely for few days.
Skyrim, Fallout, Stardew Valley, and the Animal Crossing Games are my perennial favorites!
Time will tell on this one, but I think Baldur’s Gate 3 will be one I come back to again and again.