It's not too bad being away for 5 nights at a time. After all, you're home for 5 days in a row. I don't have kids but many of my colleagues do. They use Skype and other such means to call home as often as possible. If you have a genuine crisis at home, eg partner or child very sick etc, you'll be sent home without question. If you're injured at work or fall ill, you'll be sent home as soon as possible. The company will approve the use of you and your crew to fly yourself back to your gateway if no other means to get your home in a timely manner exists. (Exceptional circumstances of course, eg wife going into labour early etc)
I find getting the overnights "over and done with" in a block's much easier than 1 or 2 nights here and there. (Done that sort of roster too).
One thing to note, when you're on days off, the company will not contact you to "come in and help out". Every other company I have worked for has done that to me on my days off. Some more often than others. You also rarely do home standby.
It is possible to request specific days off if given enough notice. Something the loco's appear not to be able to do. (if going on what my husband's easyJet roster's like)
It depends on your energy levels but if you're working for eJ (for example), you'll do a block of earlies and that may have you in bed by 8pm if not earlier. If you're doing lates, you'll be returning home often after 10pm.
Each job has it's swings and roundabouts. If you don't think you can handle being away from home for 5 nights in a row (occassionally less - very rarely more) then don't join Netjets.