There are advantages and disadvantages to being a big fish in a small pond, and there are advantages and disadvantages to being a small fish in a big pond. On balance I am probably the sort of person who prefers to be a smaller fish in a nicer or at least more interesting pond, than a bigger fish in a pond that's claustrophobic or has poor water quality. Maybe that's true of most people (and that's why they build cities). But it's not necessarily what everyone would choose. It does seem to mean that, given a small pond, I'm willing to do a bit of digging to make it bigger, at least if I think the water quality could be improved or I might like some of the new fish.