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.
Star Citizen, I like to poke my head in every few patches to see how things have progressed. I gotta say, despite what a lot of the naysayers claim, it has become quite a fun game and their development has only sped up since I first started playing. Still, a couple months hiatus every once and a while is worth it.
Fallout 4, I get that this is one of the more controversial choices but while the main storyline was super weak the world design was phenomenal. I love just wandering through the Boston area wastelands uncovering random things and fighting ghouls and bandits.