Not sure if this is a separate issue, but the title of this thread got me thinking about this:
Aside from those lucky / wealthy enough to regularly fly Business or First, one of the pleasures of flying for many cattle class passengers is the lottery of the free upgrade. So I'm wondering for these passengers, what would they do if they got their free upgrade. Enjoy the ability to sleep through the whole journey on a flat bed, or be so excited about the experience that they want to stay awake for the entire trip to maximise the experience? I'd say I would fall into the latter category (at least until I got bored or too tired).