How many houses do you think is the right amount for a world?

Thanks guys for the help. But to clarify I don't want a new world, I am not interesting in changing I love Rflong7's Ridgeview in summer. I was simply curious about what number of residential lots people think is a good number for their worlds, I think this world is a medium world. I usually haven't gotten far enough in a world that I have ever had to worry about population so I was asking the players who have more long term worlds how many they houses they think is enough.