In The Martian Chronicles, home is where the… well, actually, where is it? Home is where one belongs (identity) and where one has a past (memory and the past). None of the settlers ever seem to feel like Mars is home, although presumably the Martians do. But home can also change. Since one of the main plots in the interchapters is the movement of humans looking for a new place to settle, we can say that one of the main motivations in the book is the desire to find a home. But are any of the characters we see at home happy where they are? Is it really possible to return home? And can home—like the automated house—go on without us?
In The Martian Chronicles, the search for a home and happiness drives the characters more than any other motivation.
No characters in The Martian Chronicles are presented as being at home. Home is about comfort, and none of the characters are truly comfortable where they are.