Guam: lived there, done that.
It may be an exotic visit worth doing ONCE. Beyond that, the place really bites. For residents GUAM stands for Give Up And Move. For lonely military guys posted there, it stands for Give Up And Maaasticate. Now for the avid scuba diver, fisherman, WWII buff, or hardcore escape artist, Guam is a nice, perhaps necessary, layover before exploring some exotic islands like Palau, Yap, Chuuk, Pohnapei … simply some incredible little corners of the world.
If you remember one thing before your first visit, make it this: When the roads are damp from rain or light shower, drive about 1/2 the speed that feels normal. The roads are literally paved with coral rock, and they are slicker than sh*t when even slightly wet. It is like driving on ice … really weird, and dangerous for the novice. Frankly there is no place on the island worth speeding for, so take it slow. Visitors are notorious for skidding out of control when the roads are damp. Don’t let yourself become a number.