That’s a very loaded question and largely dspends on the following:
1) When you do plan to visit and how much do you want to pay per night? Hotel prices increase significantly during high season.
2) What area do you want to stay in? Do you want to be able to walk to restaurants and stores or drive to them? Ala Moana/Hilton Hawaiian Village area, Waikiki Beachfront, or with in a couple blocks of Waikiki Beach.
3) Do you want a hotel room that my have a mini fridge or do you want a timeshare that has a kitchen?
4) What is the most you want to pay for your resort fee per night?
I always stay at Aulani when I go to Oahu but have decided to stay in Waikiki next time to do everything on the eastern side of the island. My goal is to be within a couple blocks of Waikiki Beach or beachfront and near the Waikiki Beach Walk or Royal Hawaiian Center. Here are some the places I’ve been researching on TripAdvisor: Waikiki Beachcomber, Outrigger Waikiki Beach Resort, Royal Hawaiian, Imperial of Waikiki.