Lifestyle.... For me this is the answer to all the questions I have always had with regards to my career. So yes you can turn down a command and so you should if it is going to bring only misery, tiredness etc to you and your family.
Nowadays I don't care how big is my plane and where I sit... Where I live, the house I have, the car/bike I have and how much skiing or scuba diving I can do just like that without having to book holidays or anything like that is what makes me happy.
Like I say, I don't care where I sit because if I am happy in my environnment then I will stay in whichever company it might be and then the command will come. Actually I doesn't always take 15 years to manage to concile the two together...
So enjoying myself at work, at home and on the seniority list is what matters. We all have different aspirations but I found the lure of a LHS was often a con for me to stay. The rest of the company doesn't change...
Good luck with the choice anyway. Better to have one than none