Can’t add too much to that.
Definitely Leonard’s for the Malasadas.
We went in August 2018 to Oahu. Recommend Kailua Beach on the windward side although you are more likely to get some liquid sunshine there. We used to use the beach at Ala Moana Park but now too many homeless. In fact the in laws told us Waikiki is currently a ghost town except for the homeless.
Wife and son went on to Kauai for a few days. They stayed at the Hilton Garden Inn in Lihue which they said was nice.
I liked the Big Island. Might have just been that it was different than the other islands. Change of pace while living there. Volcanoes Park is a must see.
Leonard's.
The first time we tried to go there the line was out the door and so we went to another malasada place nearby that was recommended to us, the owner previously worked for years at Leonards.
We loved the Big Island. Just overwhelming landscape and some interesting things to see. We hiked in the north, visited black sand beaches and the place of refuge in the south, and spent some time in Kona. A highlight was a snorkeling trip near the Cook memorial. We took an overnight trip to the Volcano park and did a few hikes and drove down to chain of craters road.
IIRC, Turtle Cay Resort on Oahu is where Forgetting Sara Marshall was filmed.
We never wanted to go to Maui just because all the folks we knew who only wanted to hang out in resorts and drink went there.
Kayaking to the fern grotto in Kauai was a highlight as well, we also did a morning bikeride down along the canyon on the west side.
We used these guidebooks extensively in planning our trips and once we were there:
https://www.revealedtravelguides.com/
