I’ve stayed at all three and HRH is my fave. One time we went with 7 of us and we got the King Suite with a connecting garden room. My parents got the king bed in the suite, my kiddos slept on their sleeper sofa (which was in another room but no door) and my mother-in-law slept in one bed in the garden room and hubby and I took the other. It was comfortable for us and we left the door open so we could visit in the living room/table area of the bigger room and have access to two bathrooms. I wouldn’t want to sleep on a couch but if you have kiddos or twenty-somethings maybe their backs can still handle it.
HRH Pros: Walk, rooms are bigger than Royal Pacific, nice pool with slide
RPR was my least favorite. Something about the room layout/size I didn’t like and it felt further to me than HRH
Portofino is actually my favorite hotel if I weren’t going to the parks and the deluxe rooms have a HUGE bathroom and are bigger sized. The resort is beautiful and the pool/slide lovely. There are two quiet pools and one of the two is also really pretty. It has the best restaurants imho. But it’s the furthest walk, so HRH wins.