It's interesting to read all the different viewpoints shared here. I used to believe that flying an airplane for a living was the most important thing in my life. The more hours the better and the pay didn't really much matter as long as I was in the air. After all, I was single and didn't need much money. There's nothing you could have said to me at the time that would have discouraged me from pursuing my dream of becoming an airline pilot, or anything I would have given flying up for. I was much younger then without many ties or responsibilities.
Flash forward about a decade. A wife, child, two dogs and a mortgage payment. I've finally made it to the airlines. Been a captain for two years (soon to be downgraded back to F.O.). The pay is decent, the schedule is average, and I love the airplane I'm flying. It's the job I always dreamed about and you know what?, I'm starting to think about looking at different career options.
Like someone else above was saying, as you go through life, you're priorities change. My life isn't just about me and my desires/needs anymore. Those things are important for your personal health but you also have to compromise and strike a balance with the needs of your loved ones. Personally, this career has been hard on me and my family. After all its just an airplane and not worth destroying whats become most important in my life, and thats my family.