just got back last night from hawaii for my wedding/honey moon.
great place, we stayed at the hyatt regacy resort in waikiki which is on oahu. get ready to drop some cash there. everything and i mean everything is expensive in waikiki lol.
if you plan to travel to waikiki, i would recommend eating breakfast at dukes, they have an awesome breakfast buffet.
cheeseburger waikiki has some really good burgers
shore restaurant located in the hyatt regacy hotel has a good steak
resturant called top of waikiki is pretty cool. i think its 20 stories tall and the top is circle shaped and slowly spins. has a really awesome night view over the ocean and city and has really good steak
we also took a sunset dinner cruise. if your into crab legs than you should go on this cruise, its all you can eat.
also if you want to go to a water park, go to the wet and wild park on oahu. definitely a fun park and it has the surfing simulator
i booked most of my activities through http://www.hawaiidiscount.com
now, in my personal opinion, i dont think i would go back to hawaii. couple reasons:
long ass flight
expensive
the attractions like the aquarium are disappointing
i would go back to cacuun before going back to hawaii
btw dont rent a car in oahu, pretty confusing to drive around there and extremely bad traffic jams on their main freeways. they even have something called "beat the back to school jam"