Snapper 5, when you have quite finished talking out of your ar*e.
Nice goes to the A380 shortly with EK, we have plenty of challenging airports on the big bus and even a "nice 10 mile ILS" can be tricky in monsoon or windshear conditions.
Now, I am no expert but I have worked for 2 out of the 3 companies mentioned here and have been a trainer in both of them. I know what lifestyle my young family prefer.
I wouldn't touch Norwegian with yours, I would consider easy only with a permanent UK/French/Italian contract and a place on the waiting list out to somewhere north and I wouldn't join EK on the light twin fleet.
OC Piztoff, the best thing you can do is actually talk to people who have and continue to experience the companies you mention and then make the right decision for you and your family.
(There is life beyond Cumbernauld
)