Doh! You found out that I like the Simpsons
ULH...it may be interesting for some time, as you mentioned, but one cannot do it forever. I have done some medium-hauls (6 to 8 hours) and as long as they take place during normal times, they are acceptable. Flying through the night, is really not easy and there I am with you: I don't need that all the time.
Anyways, back to topic