I think the f.a.'s are less considerate of the need for sleep these days
I often take flights from the East Coast to the UK (EWR/PHL to MAN/London etc) and in recent years, I've found it harder and harder to get sleep because the flight attendants take so long to turn off the main cabin lights after the meal service because after clean up, they bring the duty free cart round, which they do both loudly and obtrusively (are they on commission for duty free or something?) I watch them waking up kids, disturbing business people, and I wonder why someone doesn't think about this timing. Oh, and then there's the breakfast service, which begins with clanking and lights about 2 hours after you've finally got a bit of dark and quiet after duty free. Just what you feel like, being woken up with acidic OJ and overly sweet pastries so you can sit and stare into the distance for an hour. Maybe it's just me, but I remember a time when f.a.'s would recognize that people need and want to sleep on night flights - now it seems to be all about their own routines, which aren't conducive to rest.
Yes, and I use a bose noise canceling headset, and iPhone white noise, and a eyemask from Brookstones, and all the rest, but I think, sometimes, I get annoyed by how inconsiderate they are when they bang into me with the cart, or startle me by saying "DUTY FREE" loudly right next to my head, and then I can't drop off very easily.