I would live on Kauai. My favorite island, even though my wife is from Maui. It's her favorite island, too. Doesn't get ridiculously hot there, though the humidity gets up there now and then.

One fun fact about Hawaii: Build your house out of concrete blocks and steel. The termites EAT wood houses like crazy. More than one of my wife's relatives had to just demolish their houses and build another. I had to go over and put a new plywood floor in my MIL's house, so she wouldn't fall through it!