Don't become a pilot, a doctor, a lawyer, or get an MBA if you want a normal life and want to work from 8 to 5. Some MBA's could have a normal schedule, but they are the exception. Sorry, but this is reality. Yes, some are safer careers financially, but is it really what you want to do for the rest of your working life......Zapata, I don't agree all the time with SkyHigh, but at least he is here to show us the other side of this career. We all like to think of the good parts, we like to hear the good stories, but forget many failed to get there. (This applies to many careers) Go for it, but know what you are getting into and if you have any doubts about it, maybe is not for you.
As far as family, my wife's dad was a banking executive and she only saw him once a week, and they managed to stay together all these years. If you have a wife who doesn't like moving, don't even think about it.