**Disclaimer, I am not a neurosurgeon
I stumbled onto this thread and thought I would add my 2 cents. I am a PGY5 in radiation oncology. I am married, I have kids and I also dedicate a large amount of time to exercise and preparation for my hobbies (mainly mountain climbing).
I love my job. It is extremely rewarding. Very intimate relationships with patients. Life and death is frequently on the line. There are highs and lows in cancer care, just as I am sure there are in neurosurgery. The difference is, I get to experience all of that for ~50 hours per week, then I go home to my actual life. My real life - outside the hospital.
It has been interesting for me to watch colleagues and friends from medical school in lifestyle altering fields and how there perspective changes rather quickly when they get into the real daily grind of their specialty. Many feel trapped. Many regret their decision.
In medical school it is often frowned upon to discuss medical specialties in terms of lifestyle. It's as if your future specialty is some magical match, like a soul mate. I don't buy into that. You choose it. The unfortunate part is that many medical students are choosing it at the wrong time in their lives. Many aren't married. Many have not yet had chidren. They cannot fathom how these major life changes will color their thinking..but many will later wish that they had a time machine and could go back and choose differently.
I say this not to bash any other specialty. I have nothing but respect for those who choose to go into neurosurgery. But what I am saying is that you really need to think long and hard about this and you need to realize what you are choosing. You are choosing the LIFE of a neurosurgeon. Many are ok with this. I personally would not be. If you foresee yourself has raising a family, being involved in other activities, your community, your church, etc....well, you can't have it all as another poster said above. A choice of neurosurgery is a choice of career first above all.
Don't be brainwashed that choosing a specialty is anything more than choosing a job. It is an important job. You need to be a good match for what you choose. But the JOB is not the only consideration. Don't choose a specialty just because you like it the most. See the entire picture..it's nearly impossible to do if you are 26, single and have lived a largely self-absorbed life focused on nothing other than your career. But if you foresee that changing in your future, well, you need to consider that. Find people who are 10 years ahead of where you are in the specialty you are choosing..find people who are living the life that you envision for yourself within that specialty..then get their advice and perspective.
I'm very grateful that I made the choice that I did. I realize not everyone can be a radiation oncologist..but there are plenty of fields that would have been amenable to the life that I wanted for myself. There is no way neurosurgery could have been one of them..even though I think it is a really cool job.