Taking leave from your job is important. For one thing, a bit of time away can give you more headspace, meaning that when you return, you're feeling fresh and invigorated, ready to bring new ideas and approaches to your role—or it can just mean you return with your hatred for your job freshly invigorated… If that's the case, it's a good sign that your current role and duties aren't a good use of your time, and it's time to do something else.