In an ideal world, your work is something that you love to do. In today's world, eating and having a roof over your head come first. How many recent college grads have large student loans and no job because they persued an unmarketable dream?
EDIT: I persued positions in manufacturing management for over 20 years, only to have position after position move off shore. I finally realized that I had skills that were marketable in the service industry. Was it my dream job, no but it paid the bills and provided a good retirement.