I agree it's good to find what you are truly passionate about but echo the comment about charity sector not necessarily being less stressful. I work for a charity, it's something I'm passionate about, but it has it's stresses - we work to key performance indicators just like in business. Then there's the usual stresses of job insecurity due to funding uncertainty.

Not to say you shouldn't consider it but the grass isn't always greener on the other side.

Maybe if you're unemployed you could try volunteering in the sort of areas you'd like to work to give you a tester? I was happiest of all when volunteering (still do in my downtime). Good luck!