is maintaining sanity far more important than career growth?

The past few weeks have found me a little bit less loaded and so the time has been spent on introspection and on general reflection of life now and in future. And whenever one reflects on future, either the thoughts turn to daydreams if he is optimistic about it or the thoughts take on a morbid pattern with large doses of melancholia and a general sense of incompleteness taking over the spirit. Unfortunately I was feeling low and so my thoughts would always veer on my current status in life and on the missed out opportunities, and on what would have happened if things would have gone according to our script. And well, that set me thinking. I have always been a hard working guy who will slog if there is a need and who takes immense pride in his work. But I have also found that after a bout of difficult schedule, I always needed some time out to recharge me, to prepare me for another cycle. And for me work is not the only thing that defines me. There are many many other things that I absolutely need to do to make me feel alive, to retain my sanity. There are people who keep on working hard, jumping from one project to another, compromising their personal lives to accumulate success on career front. But I am not that kind of person. For me my personal space is very very important. I have to spend time with my son. And I don't believe in quality of time spent, I am more biased towards the quantity of time. I have to take out time to chat up with my wife, with my friends, with my siblings. I absolutely have to take out time to read books or watch movies or write my own stuff. But I also have some regret about it. I believe I want the best of both worlds which is simply not possible. So is maintaining sanity more important than pursuing silly career goals which won't make me a better person? I don't know yet but I will figure it out sooner than later.