[SFW] What jobs would you do regardless of the pay?

What do you find so fulfilling that you’d spend quality time regularly doing it regardless of pay, even for free if necessary? Carrying on with our work-a-day series, this is the mirror question to the SFW – NSFW pair of 2 weeks ago about what jobs you would refuse regardless of pay. If you can’t think of a thing that’s SFW and wonderful enough to do for free, or have a comment in mind that isn’t SFW, then you might want to check the NSFW version of today’s question.