I have never finished a playthrough but as soon as I start my own kingdom and destroy a faction I consider the game 'done' even if it may not be(ex: PoP there can be 2 facs left and you could lose). I did try mods for a long time(around 300 hours) but that got boring as well, except for Nova Aetas as it changed the way you start and the grind in general but kingdom/town/village management got extremely repetitive and boring. Siege, battle, siege, battle, peace, repeat. I feel there is nothing to do, because as soon I start a new game I realize 'oh wow this is just a grind to become king' which imo is the worst part of the game because everything is so repetitive. I feel like Mount and Blade has run dry for me.