Warband. I want ability to theoretically max out every skill. Limitations should be soft caps, aka it should not be practical to get high skills in two handed weapons, polearms, crossbows, bows, throwing weapons and one handed weapons. In Warband it was arguably too easy in vanilla to become a god, but many mods made progress harder. Atm i have to choose between some skills/perks.
But i do like that we have to get good by actually doing the task, and i like focus points. Those should be kept. In Warband you could become best tactician in the world without ever leading an army, which is silly.
Also campaing's in Mount & Blade are long. If i regret my choice of focusing on crossbows, in Bannerlord i can't revert some decisions like how many bolts i can get at beginning of the battle, which is silly.