What countrys/islands did we gain from the war?
We gained more than we anticipated. Before the war, we wanted an island in the pacific for a port to stop and refuel. From the war, we gained; Puerto Rico, Guam, Panama, Hawaii, and the Philippines.
Did we get an island/country we wanted?
Yes, in fact we got more than we wanted. In the Pacific Ocean we wanted Hawaii and Gauam. In the Pacific Ocean we got Hawaii (Annexed), Gauam, and the Philippines. We didn't want anything in Central America, but if we could, we would take it. In Central America we took Pannama, Puerto Rico, and Cuba.
Did we keep those territorys?
Not all of them stayed in the U.S. Over the years one wanted independence from us, so we gave it to them, it was Cuba. Panama is still controlled by the U.S as a territory. Puerto Rico is still a U.S territory today, recently they asked the U.S government to become the 51st state. The Philippines, like most of the others, is still a U.S territory. Hawaii is still part of the U.S.A, and is one of the 50 states. Guam again is a U.S territory which is now a very large military base for; The Air Force, Marines, and Navy.