I want to make my own Souls-like game to start learning to code. What are some systems you really enjoy and hate in Souls-like games?

I'm starting to learn to code and want to make my own Souls-like game that's inspired by Zelda: Breath of the Wild. I was wondering what your favorite systems/mechanics are, which ones you genuinely find awful, and hate dealing with so I can include the good ones and discard any that people just find annoying.