I don't think it matters what profession you are in these days - there is simply never enough free time. I don't think LEOs are any different from anyone else, in that aspect.
I think the trick is to simply draw the line somewhere (you decide where), and realize that there are more important things in life (your FAMILY), that should/must take precedence over any career you have. I know far too many people whose marriage has been ruined because one or both partners put career ahead of all else. :smile:
I once worked for a Narcotics supervisor who had this to say about family time, "Your family comes first. If the dopers are selling today, they'll still be selling tomorrow." He was a very wise man. He was also a very, very successful and competent narc.