Wow, for some reasons my brain had locked that guy in as Jeff Daniels.

Modern era. Living 5 centuries in the past would suck. No germ theory of disease so everyone is ignorant regarding the importance of washing hands and basic cleanliness. Anything wrong with you? Better get the leeches to balance your humors. Uh oh, stubbed my toe. Guess I’ll just die.

The only caveat is if you get to know what you do now and can transform society because of it. As King I’d either bring about the Renaissance within a decade instead of centuries unless I was branded a heretic by the Church and beheaded for flapping my mouth.