I play too much Skyrim (between the various copies I’ve owned, I have ~3.5k hours) and one of the ways I keep it repayable is by using the Enaisiaion overhauls that another commenter mentioned.

They’re made to be largely “vanilla+” type mods, but they overhaul nearly everything. Races, perks, standing stones, the magic system, werewolves & vampires, and enchantments. He also has one that adds a faith system where you can worship the various deities of Tamriel and I think that one is a must have at this point.