I loved Earth Abides.
I read it at kleinbl00's suggestion, since I was trying to write a "more realistic" post-apocalyptic future story.
EA struck me in a couple of ways. First, the dogged determination of the people in the story to remain in their atomic 1950's-era living situation - living in houses with running water, etc. - while the generation after them became more "feral" or comfortable with the actual reality they were living in.
Then, at the end, the protagonist's descent into Alzheimers/dementia, as told from the first-person perspective, was surprisingly heart-warming and gentle.
I may be ready to read it again. I know I will eventually.