Thanks for all the answers.

Obviously I'm referring only to European short-haul where due to an early wake up, an A or F seat increases a lot the possibilities for catching up some sleep.
Sometimes I'd appreciate more a good no service flight. No food, no duty free, no flight update announcement, no main light, no spot light, just the very soft light (the ones that stay on during a might landing). Just being able to recline my seat and sleep.