We just finished watching a documentary on Studio Ghibli -The Kingdom of Magic and Madness. It deals with Hayao Miyazaki's last film (which actually isn't). He intimated that he thought it was stupid for anyone to say they worked for their happiness, but it couldn't happen. No matter what you did for work, it would not bring you happiness.
With that in mind,
Does your work (or what you would consider your work) make you happy?
What's keeping you from pursuing something that would make you more content or feel more accomplished?
Given all that you know at this moment, if you had to do it over again, would you?