Halfwayback,
Sorry but you are referring to flying for pleasure and NOT conducting revenue flights where fatigue is important. If you are fatigued then you should not be flying but resting.
I worded my post the way I did because I know its a tough call beween the two.
Obviously hearing loss will always come top of the list, afterall, your medical and everything else depends on it.
However, the fatigue element should not be ignored and hence is I said "pretty much as important"..... I did not say "more important" !!