It’s an unfortunate fact that more than 50% of working Americans admit to being unhappy on the job. And while some of that boils down to factors like money or work-related stress, a big part of it stems from the fact that many folks end up choosing the wrong profession. That’s why it’s important to understand not just what you want out of a job, but what you really don’t want. With that in mind, here are some of the roles your Foolish investors would avoid at all costs.