In 2008 I had the unique pleasure of declaring myself a full-time freelance writer. And I haven't looked back. I love what I do.
Even so, there are difficult days doing what I love. There are difficult projects, snarky (potential) clients, and long days of figuring things out. Not to mention no paid time off, getting health insurance on my own, and sometimes patching income together to make it all work. And there are days when I take on a project or a client I'm not wild about because it has good potential or provides steady work.
And still, when I'm slogging through a less-than-exciting project, I remind myself that even on the difficult days, I'm doing what I love. That's what it's about, isn't it? Perspective?
Yes, it's wonderful to be able to do what you love, particularly as a career. However, it's just as important to love what you do, wherever you are in your life and career.
There are likely to be jobs you don't like, both in and out of your field of study. And when you're faced with a less-than-pleasant job, you have to make the most of your position. If you don't do what you love, find a way to love what you do. Do what you can to make every moment of the job your own and enjoy it the best you can.
And you may just find that, after a while, you'll love what you do, and if you aren't already, you'll be doing what you love!