reading on flight deck
Well we had one German captain who insisted on no newspapers on the flightdeck as all the instruments should be monitored at all times. Shame his attention to detail didn't extend to personal hygiene.
We had one French captain who would have the paper open before the gear lights were extinguished.
Both these guys are now elsewhere thankfully, and no reflection on their respective nationalities.
I suggest somewhere between these two extremes would be acceptable depending on workload, conditions, etc. There must still be a place in this sanitised job for commonsense.