I think I've put over 500 hours into Skyrim and still haven't met the Greybeards. What a game.
Final Fantasy 12 is another game I keep picking up every couple years and I swear I keep dropping it at the same point every time.
Dragon Age Inquisition I really need to pick up again, that was a good one, but I need to finish Horizon Zero Dawn first, then go back to Elden Ring, probably pick Witcher 3 back up at some point.. yeah, I have a lot of unfinished games.