Have you ever feels the satisfaction on any job you've done so far?
It's nice and cool when you do something and you done it right, you done it honestly, and you done it great.
Never think negative on the job you are doing even if its paid or not, if you are honest about it you can done it great.
If you don't like you job then, just quit it. Don't get stressed over a job that doesn't suit you, it might effects your health, your social life or your anything arounds you.
But never say no to a job that you haven't give any efforts towards it. Do it first then decide after that.
For me I accept any job offered as long as I can do it with all the will I have and its legal. Everything is a challenge in our life and it depends on how we struggle to get use to it and make changes from and into it.