Ha, when i said this before, I was accused of trolling.
It really depends on what you're into. Every island will have great beaches, including quiet ones if you know where to look.
-If you want to jetski+kayak+snorkel then just stick with HNL.
-If you want to see your most incredible sunset/sunrise+volcanoes erupting+hike past eruptions+swim in volcanically heated lava pools but do all that in a cooler/rainier climate with little natural beauty stick to ITO.
-If you want to drive/hike among hundreds of waterfalls+whale watch in the winter stick with OGG.
-If you want to see a stunning Hawaii that's less touristy than OGG and has incredible hiking and a pristine quiet beach that goes on for miles stick with LIH.
Haven't made it to Molokai or Lanai, can't comment on those.