The most important part of any RPG is the part where you nudge nose and chin sliders for an hour, and Mount & Blade 2 is blessedly full of those. Aside from being good in general, the medieval sandbox's character creator is quite powerful, offering enough flexibility to create a guy who could at least be Geralt's cousin, Meralt.
I especially appreciate that M&B2 includes asymmetry sliders so that you can add a little of the crookedness that gives characters their character. No one has perfectly identical features. Except Meralt, but he's special.