In hard-core science fiction in which characters are responding to a change in environment caused by nature or the universe or technology what readers want to see is how people cope and so the character are present to cope or fail to cope.
A good day is one where I can not just read a book but write a review of it. Maybe today I'll be able to do that. I get for some reason somewhat stronger when the sun starts to go down. Dusk is a good time for me. I'm crepuscular.