i will settle or take them too.
The farther away from my capital it is, the more likely i end up using
the island as a military base and not realy bother to develop its civilian use.
Just build a port,barracks,airport, maybe even a temple and library for
the culture points.
As others pointed out,,good place for wounded ships to retreat too and
heal up,,,,makes an unsinkable air base,,if you have an airport you can
Reinforce the garrison troops quickly with airlifts.
if you have enough gold the SAMs and Civil defense are highly recomended
quick builds.
If there be fishies or iron or coal,,,,hey hey hey! Bonus!