At dispatch I like to ascertain the crews previous experience, GA Military Cadet etc. and if there are any G.A. guys then I don't really sleep.
I prefer to sit in the rest seats and stay alert for any unforeseen circumstances.
People may think this is over the top but I cant trust these G.A. guys at the wheel, I probably wouldn't sleep that well anyway.
If the crew are predominantly ex military then that's a different story.