One thing I love about the 787 is the higher (read: adequate) humidity provided in the cabin for passengers. Rather than desiccate the air (for the safety, functionality, and longevity of the plane and it's systems), the 787's cabin moisture is a lot more natural.
On our semi yearly trips to Japan, I would, like clockwork, throw up when I got to my Folks' house. Since Jetstar changed to 787's for this leg, no such trouble. I don't know how much this aspect matters to others (or even if it's medically provable), but it's made a world of difference to me
