I've had several GPs check me and they each said I just need more sleep than "average". They've given me the standard spiel, about going to bed and waking up a

I've had several GPs check me and they each said I just need more sleep than "average". They've given me the standard spiel, about going to bed and waking up at the same time, keeping the bedroom dark and quiet, only engaging in subdued activities for an hour before bed, etc - each of which I've done for substantial periods. As life interfered with each of these, I've learned that –within reason– none of them noticeably effect the amount of sleep I need or the quality of sleep I get within a period of time.