I know it depends on the person but what I am really asking is what job generally has workers at their best well being. A job with tons of challenges may be fulfilling for a lot of people, but I am referring to jobs where you can be with people you like and just be happy
I work at Trader Joe's for example and imo that is the closest I can get to a “happy job”. Sure, it's definitely customer service but the job itself makes me happy. I think these kind of jobs are rare tho.