In general, I care the most about it being easy to debug by a random person who's never seen it before and barely knows the language either. So #2 stack trace a

In general, I care the most about it being easy to debug by a random person who's never seen it before and barely knows the language either. So #2 stack trace as you said. Add in simple syntax. Lots of languages, libs, frameworks, etc show off how nice they are when everything is happy and ok; that's easy.