Every island will have its attractions, so it will be kind of hard to help. But from your OP it sounds like you are thinking about Oahu. That is where I was born and raised. Check out Ko'olina Resorts, been there multiple times, extremely nice with gorgeous man made lagoons and multiple hotels that are it's property. Each having its own specialty. But it all depends what you want to do though. Food is good wherever you go, trust me! You'll notice that people are bigger down there, lol. Beaches are all over the place. Or you can hike a mile or two on trails through the forest and thn rinse off under a waterfall at the end of the trail.
If not, what about a 7 day cruise on a cruise ship? You hit all the islands and get to spend time on each. That one everything is included i believe.