I see a high mark as a sign you lack the ability to dream. I can imangine living in a mansion with my own personal hockey rink, and dozens of other weird luxuries that I could never afford (and realistically wouldn't use often if at all). Just the difference between that dream and my normal suburban house lowers me to a three. I can think of lots of non house things my best possible life would have - not all are even physically possible and many others are not moral (a few dozen wives who are devoted only to me)