Skyrim and Fallout: New Vegas are games I often go back to. BG3 is still a bit too new to say for sure whether I'll still be interested in it in 2, 5, 10 years. But it should be said a big reason for the longevity of Bethesda titles (I know NV isn't really Bethesda besides the engine) is modding - people are always coming up with something to make them a new experience (for example I've recently replayed Fallout 4 with the Sim Settlements 2 mod and its quite fun, if crash prone).
