"Choose a job you love and you will never have to work a day of your life."
You must have watched this movie; 3 idiots. Where three friends are studying at an engineering school. One of them was a natural, loved engineering bone deep. And the other also loved engineering but lived in fear of responsibility, fear of what might happen if he failed in college. Then, THE LAST ONE which is the topic of this discussion was in love with photography. He wanted to take pictures, wanted to save good memories, he wanted to look beyond the world and see the beauty in it. That's what his heart wanted. But then, he's stucked to Imperial Engineering College cos he dad wants him there. So he failed woefully in college. He tried his best to perform but he couldn't because engineering was not his passion. He was studying engineering because his dad wants him to and he graduated at the very bottom of his class.
At the end he summoned the courage to tell his dad he wants to do photography. And he became an excellent photographer.
And the natural engineer became a successful engineer and engineering was fun to him, never felt like he was working, and always enjoyed doing engineering.
BOTTOM LINE: Find your passion and you will never work a day. Find your passion and you will always have fun doing what you do.