I'm mildly indifferent to Hawaii at large with a taste of contempt for Waikiki. It's over-developed, and a wade into the water will slice your feet on some lava rocks. That being said, the hotel that taught me to truly appreciate hotels is located on that very same over-developed, lava rock infested beach on Oahu.
The Halekulani is a great hotel for all the right reasons. It's an independent property. The rooms are well-appointed, comfortable but not extravagant. The view of Diamond Head and the Pacific are awe inspiring. Restaurants on site are diverse and each tasty. Paramount for me though is the service. If you were ever curious what nobility felt like but lacked the title to find out by divine right, the Halekulani is a great place to give it a try.